56807693891 has 4 divisors (see below), whose sum is σ = 61177516512. Its totient is φ = 52437871272.

The previous prime is 56807693857. The next prime is 56807693897. The reversal of 56807693891 is 19839670865.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56807693891 - 2¹⁰ = 56807692867 is a prime.

It is a super-2 number, since 2×56807693891² (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 (56807693897) 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, 2184911291 + ... + 2184911316.

It is an arithmetic number, because the mean of its divisors is an integer number (15294379128).

Almost surely, 2^56807693891 is an apocalyptic number.

56807693891 is a deficient number, since it is larger than the sum of its proper divisors (4369822621).

56807693891 is a wasteful number, since it uses less digits than its factorization.

56807693891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369822620.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 56807693891 in words is "fifty-six billion, eight hundred seven million, six hundred ninety-three thousand, eight hundred ninety-one".