56391288208 has 20 divisors (see below), whose sum is σ = 109290732748. Its totient is φ = 28187228160.

The previous prime is 56391288181. The next prime is 56391288209. The reversal of 56391288208 is 80288219365.

It can be written as a sum of positive squares in 2 ways, for example, as 22664700304 + 33726587904 = 150548^2 + 183648^2 .

It is not an unprimeable number, because it can be changed into a prime (56391288209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470541 + ... + 578092.

Almost surely, 2^56391288208 is an apocalyptic number.

It is an amenable number.

56391288208 is a deficient number, since it is larger than the sum of its proper divisors (52899444540).

56391288208 is a wasteful number, since it uses less digits than its factorization.

56391288208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052002 (or 1051996 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 56391288208 in words is "fifty-six billion, three hundred ninety-one million, two hundred eighty-eight thousand, two hundred eight".