56959072921 has 9 divisors (see below), whose sum is σ = 58392233949. Its totient is φ = 55560280800.

The previous prime is 56959072861. The next prime is 56959072949. The reversal of 56959072921 is 12927095965.

The square root of 56959072921 is 238661.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1234749321 + 55724323600 = 35139^2 + 236060^2 .

It is not a de Polignac number, because 56959072921 - 2²⁷ = 56824855193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56959072721) 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 8 ways as a sum of consecutive naturals, for example, 9782191 + ... + 9788011.

Almost surely, 2^56959072921 is an apocalyptic number.

56959072921 is the 238661-st square number.

56959072921 is the 119331-st centered octagonal number.

It is an amenable number.

56959072921 is a deficient number, since it is larger than the sum of its proper divisors (1433161028).

56959072921 is an frugal number, since it uses more digits than its factorization.

56959072921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11724 (or 5862 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 56959072921 in words is "fifty-six billion, nine hundred fifty-nine million, seventy-two thousand, nine hundred twenty-one".