56491718571 has 48 divisors (see below), whose sum is σ = 89410176000. Its totient is φ = 35185228848.

The previous prime is 56491718557. The next prime is 56491718587. The reversal of 56491718571 is 17581719465.

56491718571 is a `hidden beast` number, since 5 + 6 + 49 + 17 + 18 + 571 = 666.

It is not a de Polignac number, because 56491718571 - 2¹⁴ = 56491702187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56491718551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1123630 + ... + 1172828.

It is an arithmetic number, because the mean of its divisors is an integer number (1862712000).

Almost surely, 2^56491718571 is an apocalyptic number.

56491718571 is a deficient number, since it is larger than the sum of its proper divisors (32918457429).

56491718571 is a wasteful number, since it uses less digits than its factorization.

56491718571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49317 (or 49268 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 54.

The spelling of 56491718571 in words is "fifty-six billion, four hundred ninety-one million, seven hundred eighteen thousand, five hundred seventy-one".