56156616550 has 24 divisors (see below), whose sum is σ = 105028402752. Its totient is φ = 22338540000.

The previous prime is 56156616497. The next prime is 56156616601. The reversal of 56156616550 is 5561665165.

It is a self number, because there is not a number n which added to its sum of digits gives 56156616550.

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, 3093526 + ... + 3111625.

It is an arithmetic number, because the mean of its divisors is an integer number (4376183448).

Almost surely, 2^56156616550 is an apocalyptic number.

56156616550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56156616550 is a deficient number, since it is larger than the sum of its proper divisors (48871786202).

56156616550 is a wasteful number, since it uses less digits than its factorization.

56156616550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6205344 (or 6205339 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 56156616550 in words is "fifty-six billion, one hundred fifty-six million, six hundred sixteen thousand, five hundred fifty".