56831006681 has 4 divisors (see below), whose sum is σ = 60174007092. Its totient is φ = 53488006272.

The previous prime is 56831006677. The next prime is 56831006801. The reversal of 56831006681 is 18660013865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46561008400 + 10269998281 = 215780^2 + 101341^2 .

It is a cyclic number.

It is not a de Polignac number, because 56831006681 - 2² = 56831006677 is a prime.

It is a super-2 number, since 2×56831006681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56831006611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671500180 + ... + 1671500213.

It is an arithmetic number, because the mean of its divisors is an integer number (15043501773).

Almost surely, 2^56831006681 is an apocalyptic number.

It is an amenable number.

56831006681 is a deficient number, since it is larger than the sum of its proper divisors (3343000411).

56831006681 is a wasteful number, since it uses less digits than its factorization.

56831006681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343000410.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 56831006681 in words is "fifty-six billion, eight hundred thirty-one million, six thousand, six hundred eighty-one".