56639599971 has 8 divisors (see below), whose sum is σ = 75521085120. Its totient is φ = 37758924072.

The previous prime is 56639599949. The next prime is 56639599981. The reversal of 56639599971 is 17999593665.

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

It is not a de Polignac number, because 56639599971 - 2⁹ = 56639599459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56639599896 and 56639599905.

It is not an unprimeable number, because it can be changed into a prime (56639599901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13945 + ... + 336858.

It is an arithmetic number, because the mean of its divisors is an integer number (9440135640).

Almost surely, 2^56639599971 is an apocalyptic number.

56639599971 is a deficient number, since it is larger than the sum of its proper divisors (18881485149).

56639599971 is a wasteful number, since it uses less digits than its factorization.

56639599971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404625.

The product of its digits is 124002900, while the sum is 69.

The spelling of 56639599971 in words is "fifty-six billion, six hundred thirty-nine million, five hundred ninety-nine thousand, nine hundred seventy-one".