56642132091 has 32 divisors (see below), whose sum is σ = 80214451200. Its totient is φ = 35429667840.

The previous prime is 56642132059. The next prime is 56642132149. The reversal of 56642132091 is 19023124665.

It is not a de Polignac number, because 56642132091 - 2⁵ = 56642132059 is a prime.

It is a super-2 number, since 2×56642132091² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56642132051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36331570 + ... + 36333128.

It is an arithmetic number, because the mean of its divisors is an integer number (2506701600).

Almost surely, 2^56642132091 is an apocalyptic number.

56642132091 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56642132091 is a deficient number, since it is larger than the sum of its proper divisors (23572319109).

56642132091 is a wasteful number, since it uses less digits than its factorization.

56642132091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 56642132091 in words is "fifty-six billion, six hundred forty-two million, one hundred thirty-two thousand, ninety-one".