56352512781 has 32 divisors (see below), whose sum is σ = 88530710400. Its totient is φ = 35304595200.

The previous prime is 56352512767. The next prime is 56352512803. The reversal of 56352512781 is 18721525365.

56352512781 is a `hidden beast` number, since 5 + 6 + 3 + 52 + 512 + 7 + 81 = 666.

It is not a de Polignac number, because 56352512781 - 2¹¹ = 56352510733 is a prime.

It is a super-2 number, since 2×56352512781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56352512701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209331 + ... + 395631.

It is an arithmetic number, because the mean of its divisors is an integer number (2766584700).

Almost surely, 2^56352512781 is an apocalyptic number.

56352512781 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56352512781 is a deficient number, since it is larger than the sum of its proper divisors (32178197619).

56352512781 is a wasteful number, since it uses less digits than its factorization.

56352512781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186986 (or 186980 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The spelling of 56352512781 in words is "fifty-six billion, three hundred fifty-two million, five hundred twelve thousand, seven hundred eighty-one".