1611420641 has 16 divisors (see below), whose sum is σ = 1795599360. Its totient is φ = 1440183360.

The previous prime is 1611420637. The next prime is 1611420649. The reversal of 1611420641 is 1460241161.

It is a cyclic number.

It is not a de Polignac number, because 1611420641 - 2² = 1611420637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1611420641.

It is not an unprimeable number, because it can be changed into a prime (1611420649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18290 + ... + 59643.

It is an arithmetic number, because the mean of its divisors is an integer number (112224960).

Almost surely, 2^1611420641 is an apocalyptic number.

It is an amenable number.

1611420641 is a deficient number, since it is larger than the sum of its proper divisors (184178719).

1611420641 is a wasteful number, since it uses less digits than its factorization.

1611420641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78016.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1611420641 is about 40142.5041695209. The cubic root of 1611420641 is about 1172.3833465958.

The spelling of 1611420641 in words is "one billion, six hundred eleven million, four hundred twenty thousand, six hundred forty-one".