1621043160 has 512 divisors, whose sum is σ = 6046617600. Its totient is φ = 342917120.

The previous prime is 1621043147. The next prime is 1621043161. The reversal of 1621043160 is 613401261.

1621043160 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1621043160.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621043161) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30585694 + ... + 30585746.

It is an arithmetic number, because the mean of its divisors is an integer number (11809800).

Almost surely, 2^1621043160 is an apocalyptic number.

1621043160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621043160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3023308800).

1621043160 is an abundant number, since it is smaller than the sum of its proper divisors (4425574440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621043160 is a wasteful number, since it uses less digits than its factorization.

1621043160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1621043160 is about 40262.1802688329. The cubic root of 1621043160 is about 1174.7123267383.

The spelling of 1621043160 in words is "one billion, six hundred twenty-one million, forty-three thousand, one hundred sixty".