56691819682 has 8 divisors (see below), whose sum is σ = 85993209900. Its totient is φ = 28027416384.

The previous prime is 56691819659. The next prime is 56691819683. The reversal of 56691819682 is 28691819665.

It can be written as a sum of positive squares in 2 ways, for example, as 43915812721 + 12776006961 = 209561^2 + 113031^2 .

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

It is a super-2 number, since 2×56691819682² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56691819682.

It is not an unprimeable number, because it can be changed into a prime (56691819683) 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, 159246507 + ... + 159246862.

Almost surely, 2^56691819682 is an apocalyptic number.

56691819682 is a deficient number, since it is larger than the sum of its proper divisors (29301390218).

56691819682 is a wasteful number, since it uses less digits than its factorization.

56691819682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318493460.

The product of its digits is 11197440, while the sum is 61.

The spelling of 56691819682 in words is "fifty-six billion, six hundred ninety-one million, eight hundred nineteen thousand, six hundred eighty-two".