561959828731 has 32 divisors (see below), whose sum is σ = 655912857600. Its totient is φ = 471539439360.

The previous prime is 561959828699. The next prime is 561959828737. The reversal of 561959828731 is 137828959165.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 561959828731 - 2⁵ = 561959828699 is a prime.

It is a super-2 number, since 2×561959828731² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (561959828737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127051786 + ... + 127056208.

It is an arithmetic number, because the mean of its divisors is an integer number (20497276800).

Almost surely, 2^561959828731 is an apocalyptic number.

561959828731 is a deficient number, since it is larger than the sum of its proper divisors (93953028869).

561959828731 is a wasteful number, since it uses less digits than its factorization.

561959828731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499.

The product of its digits is 32659200, while the sum is 64.

The spelling of 561959828731 in words is "five hundred sixty-one billion, nine hundred fifty-nine million, eight hundred twenty-eight thousand, seven hundred thirty-one".