56440928865 has 8 divisors (see below), whose sum is σ = 90305486208. Its totient is φ = 30101828720.

The previous prime is 56440928839. The next prime is 56440928879. The reversal of 56440928865 is 56882904465.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56440928865 - 2⁶ = 56440928801 is a prime.

It is a super-2 number, since 2×56440928865² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881364281 + ... + 1881364310.

It is an arithmetic number, because the mean of its divisors is an integer number (11288185776).

Almost surely, 2^56440928865 is an apocalyptic number.

It is an amenable number.

56440928865 is a deficient number, since it is larger than the sum of its proper divisors (33864557343).

56440928865 is a wasteful number, since it uses less digits than its factorization.

56440928865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762728599.

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 56440928865 in words is "fifty-six billion, four hundred forty million, nine hundred twenty-eight thousand, eight hundred sixty-five".