56908569217 has 4 divisors (see below), whose sum is σ = 57982315860. Its totient is φ = 55834822576.

The previous prime is 56908569173. The next prime is 56908569227. The reversal of 56908569217 is 71296580965.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71296580965 = 5 ⋅14259316193.

It can be written as a sum of positive squares in 2 ways, for example, as 17735846976 + 39172722241 = 133176^2 + 197921^2 .

It is a cyclic number.

It is not a de Polignac number, because 56908569217 - 2⁷ = 56908569089 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56908569227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536873242 + ... + 536873347.

It is an arithmetic number, because the mean of its divisors is an integer number (14495578965).

Almost surely, 2^56908569217 is an apocalyptic number.

It is an amenable number.

56908569217 is a deficient number, since it is larger than the sum of its proper divisors (1073746643).

56908569217 is a wasteful number, since it uses less digits than its factorization.

56908569217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073746642.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 56908569217 in words is "fifty-six billion, nine hundred eight million, five hundred sixty-nine thousand, two hundred seventeen".