561276160 has 72 divisors (see below), whose sum is σ = 1350560736. Its totient is φ = 223488000.

The previous prime is 561276151. The next prime is 561276167. The reversal of 561276160 is 61672165.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561276167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320407 + ... + 322153.

It is an arithmetic number, because the mean of its divisors is an integer number (18757788).

Almost surely, 2^561276160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561276160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675280368).

561276160 is an abundant number, since it is smaller than the sum of its proper divisors (789284576).

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

561276160 is a wasteful number, since it uses less digits than its factorization.

561276160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019 (or 2005 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 561276160 is about 23691.2675895571. The cubic root of 561276160 is about 824.8827063121.

The spelling of 561276160 in words is "five hundred sixty-one million, two hundred seventy-six thousand, one hundred sixty".