56639599947 has 32 divisors (see below), whose sum is σ = 97854848000. Its totient is φ = 32365480392.

The previous prime is 56639599943. The next prime is 56639599949. The reversal of 56639599947 is 74999593665.

56639599947 is a `hidden beast` number, since 5 + 66 + 395 + 99 + 94 + 7 = 666.

It is not a de Polignac number, because 56639599947 - 2² = 56639599943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56639599943) 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, 3048703 + ... + 3067224.

It is an arithmetic number, because the mean of its divisors is an integer number (3057964000).

Almost surely, 2^56639599947 is an apocalyptic number.

56639599947 is a deficient number, since it is larger than the sum of its proper divisors (41215248053).

56639599947 is an equidigital number, since it uses as much as digits as its factorization.

56639599947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115957 (or 6115937 counting only the distinct ones).

The product of its digits is 496011600, while the sum is 72.

The spelling of 56639599947 in words is "fifty-six billion, six hundred thirty-nine million, five hundred ninety-nine thousand, nine hundred forty-seven".