561722839500 has 96 divisors (see below), whose sum is σ = 1643073030144. Its totient is φ = 149120952000.

The previous prime is 561722839477. The next prime is 561722839529. The reversal of 561722839500 is 5938227165.

It is a self number, because there is not a number n which added to its sum of digits gives 561722839500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 505146 + ... + 1174145.

It is an arithmetic number, because the mean of its divisors is an integer number (17115344064).

Almost surely, 2^561722839500 is an apocalyptic number.

561722839500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561722839500 is an abundant number, since it is smaller than the sum of its proper divisors (1081350190644).

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

561722839500 is a wasteful number, since it uses less digits than its factorization.

561722839500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679536 (or 1679524 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 561722839500 in words is "five hundred sixty-one billion, seven hundred twenty-two million, eight hundred thirty-nine thousand, five hundred".