56556193566 has 16 divisors (see below), whose sum is σ = 113146222464. Its totient is φ = 18846425304.

The previous prime is 56556193541. The next prime is 56556193567. The reversal of 56556193566 is 66539165565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56556193567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388050 + ... + 1428213.

It is an arithmetic number, because the mean of its divisors is an integer number (7071638904).

Almost surely, 2^56556193566 is an apocalyptic number.

56556193566 is an abundant number, since it is smaller than the sum of its proper divisors (56590028898).

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

56556193566 is a wasteful number, since it uses less digits than its factorization.

56556193566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819615.

The product of its digits is 21870000, while the sum is 57.

The spelling of 56556193566 in words is "fifty-six billion, five hundred fifty-six million, one hundred ninety-three thousand, five hundred sixty-six".