56315171806 has 4 divisors (see below), whose sum is σ = 84472757712. Its totient is φ = 28157585902.

The previous prime is 56315171791. The next prime is 56315171807. The reversal of 56315171806 is 60817151365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60817151365 = 5 ⋅12163430273.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56315171807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14078792950 + ... + 14078792953.

It is an arithmetic number, because the mean of its divisors is an integer number (21118189428).

Almost surely, 2^56315171806 is an apocalyptic number.

56315171806 is a deficient number, since it is larger than the sum of its proper divisors (28157585906).

56315171806 is a wasteful number, since it uses less digits than its factorization.

56315171806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28157585905.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 56315171806 in words is "fifty-six billion, three hundred fifteen million, one hundred seventy-one thousand, eight hundred six".