56707708681 has 8 divisors (see below), whose sum is σ = 61072520264. Its totient is φ = 52343280000.

The previous prime is 56707708669. The next prime is 56707708703. The reversal of 56707708681 is 18680770765.

It can be written as a sum of positive squares in 4 ways, for example, as 877107456 + 55830601225 = 29616^2 + 236285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56707708681 - 2³¹ = 54560225033 is a prime.

It is a super-2 number, since 2×56707708681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56707708621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261181 + ... + 426181.

It is an arithmetic number, because the mean of its divisors is an integer number (7634065033).

Almost surely, 2^56707708681 is an apocalyptic number.

It is an amenable number.

56707708681 is a deficient number, since it is larger than the sum of its proper divisors (4364811583).

56707708681 is a wasteful number, since it uses less digits than its factorization.

56707708681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191451.

The product of its (nonzero) digits is 3951360, while the sum is 55.

The spelling of 56707708681 in words is "fifty-six billion, seven hundred seven million, seven hundred eight thousand, six hundred eighty-one".