56643832491 has 8 divisors (see below), whose sum is σ = 75562824000. Its totient is φ = 37743697992.

The previous prime is 56643832471. The next prime is 56643832501. The reversal of 56643832491 is 19423834665.

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

It is not a de Polignac number, because 56643832491 - 2²⁵ = 56610278059 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (56643832411) 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, 4707241 + ... + 4719258.

It is an arithmetic number, because the mean of its divisors is an integer number (9445353000).

Almost surely, 2^56643832491 is an apocalyptic number.

56643832491 is a deficient number, since it is larger than the sum of its proper divisors (18918991509).

56643832491 is a wasteful number, since it uses less digits than its factorization.

56643832491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428505.

The product of its digits is 3732480, while the sum is 51.

The spelling of 56643832491 in words is "fifty-six billion, six hundred forty-three million, eight hundred thirty-two thousand, four hundred ninety-one".