56686590936 has 224 divisors, whose sum is σ = 164102145600. Its totient is φ = 18341406720.

The previous prime is 56686590929. The next prime is 56686590941. The reversal of 56686590936 is 63909568665.

56686590936 is a `hidden beast` number, since 5 + 6 + 6 + 8 + 6 + 590 + 9 + 36 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 28103400 + ... + 28105416.

Almost surely, 2^56686590936 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 56686590936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82051072800).

56686590936 is an abundant number, since it is smaller than the sum of its proper divisors (107415554664).

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

56686590936 is a wasteful number, since it uses less digits than its factorization.

56686590936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

The spelling of 56686590936 in words is "fifty-six billion, six hundred eighty-six million, five hundred ninety thousand, nine hundred thirty-six".