56619391800 has 48 divisors (see below), whose sum is σ = 175520116440. Its totient is φ = 15098504320.

The previous prime is 56619391711. The next prime is 56619391823. The reversal of 56619391800 is 819391665.

It is a self number, because there is not a number n which added to its sum of digits gives 56619391800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47182227 + ... + 47183426.

Almost surely, 2^56619391800 is an apocalyptic number.

56619391800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56619391800 is an abundant number, since it is smaller than the sum of its proper divisors (118900724640).

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

56619391800 is a wasteful number, since it uses less digits than its factorization.

56619391800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94365672 (or 94365663 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 56619391800 in words is "fifty-six billion, six hundred nineteen million, three hundred ninety-one thousand, eight hundred".