56921927947 has 4 divisors (see below), whose sum is σ = 57331438360. Its totient is φ = 56512417536.

The previous prime is 56921927941. The next prime is 56921927977. The reversal of 56921927947 is 74972912965.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56921927947 - 2¹⁵ = 56921895179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56921927941) 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 3 ways as a sum of consecutive naturals, for example, 204754998 + ... + 204755275.

It is an arithmetic number, because the mean of its divisors is an integer number (14332859590).

Almost surely, 2^56921927947 is an apocalyptic number.

56921927947 is a deficient number, since it is larger than the sum of its proper divisors (409510413).

56921927947 is a wasteful number, since it uses less digits than its factorization.

56921927947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409510412.

The product of its digits is 17146080, while the sum is 61.

The spelling of 56921927947 in words is "fifty-six billion, nine hundred twenty-one million, nine hundred twenty-seven thousand, nine hundred forty-seven".