56180384991 has 12 divisors (see below), whose sum is σ = 81157820640. Its totient is φ = 37449724320.

The previous prime is 56180384987. The next prime is 56180385029. The reversal of 56180384991 is 19948308165.

56180384991 is a `hidden beast` number, since 561 + 8 + 0 + 38 + 49 + 9 + 1 = 666.

It is not a de Polignac number, because 56180384991 - 2² = 56180384987 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56180384941) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 228670 + ... + 405771.

It is an arithmetic number, because the mean of its divisors is an integer number (6763151720).

Almost surely, 2^56180384991 is an apocalyptic number.

56180384991 is a deficient number, since it is larger than the sum of its proper divisors (24977435649).

56180384991 is a wasteful number, since it uses less digits than its factorization.

56180384991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644286 (or 644283 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 56180384991 in words is "fifty-six billion, one hundred eighty million, three hundred eighty-four thousand, nine hundred ninety-one".