56178524781 has 8 divisors (see below), whose sum is σ = 83227444160. Its totient is φ = 37452349836.

The previous prime is 56178524777. The next prime is 56178524783. The reversal of 56178524781 is 18742587165.

56178524781 is a `hidden beast` number, since 56 + 1 + 78 + 52 + 478 + 1 = 666.

It is not a de Polignac number, because 56178524781 - 2² = 56178524777 is a prime.

It is a super-2 number, since 2×56178524781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56178524783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040343025 + ... + 1040343078.

It is an arithmetic number, because the mean of its divisors is an integer number (10403430520).

Almost surely, 2^56178524781 is an apocalyptic number.

It is an amenable number.

56178524781 is a deficient number, since it is larger than the sum of its proper divisors (27048919379).

56178524781 is a wasteful number, since it uses less digits than its factorization.

56178524781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080686112 (or 2080686106 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 54.

The spelling of 56178524781 in words is "fifty-six billion, one hundred seventy-eight million, five hundred twenty-four thousand, seven hundred eighty-one".