561907215504 has 80 divisors (see below), whose sum is σ = 1613064435840. Its totient is φ = 187281198720.

The previous prime is 561907215473. The next prime is 561907215533. The reversal of 561907215504 is 405512709165.

It is a happy number.

561907215504 is a `hidden beast` number, since 5 + 6 + 1 + 90 + 7 + 2 + 1 + 550 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 561907215504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4007869 + ... + 4145699.

It is an arithmetic number, because the mean of its divisors is an integer number (20163305448).

Almost surely, 2^561907215504 is an apocalyptic number.

561907215504 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

561907215504 is an abundant number, since it is smaller than the sum of its proper divisors (1051157220336).

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

561907215504 is a wasteful number, since it uses less digits than its factorization.

561907215504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147285 (or 147273 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 561907215504 in words is "five hundred sixty-one billion, nine hundred seven million, two hundred fifteen thousand, five hundred four".