53857692891 has 6 divisors (see below), whose sum is σ = 77794445300. Its totient is φ = 35905128588.

The previous prime is 53857692887. The next prime is 53857692899. The reversal of 53857692891 is 19829675835.

53857692891 is a `hidden beast` number, since 5 + 38 + 576 + 9 + 28 + 9 + 1 = 666.

53857692891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53857692891 - 2² = 53857692887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53857692899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2992094041 + ... + 2992094058.

Almost surely, 2^53857692891 is an apocalyptic number.

53857692891 is a deficient number, since it is larger than the sum of its proper divisors (23936752409).

53857692891 is a wasteful number, since it uses less digits than its factorization.

53857692891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984188105 (or 5984188102 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 53857692891 in words is "fifty-three billion, eight hundred fifty-seven million, six hundred ninety-two thousand, eight hundred ninety-one".