56641145465 has 4 divisors (see below), whose sum is σ = 67969374564. Its totient is φ = 45312916368.

The previous prime is 56641145459. The next prime is 56641145489. The reversal of 56641145465 is 56454114665.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40008400441 + 16632745024 = 200021^2 + 128968^2 .

It is a cyclic number.

It is not a de Polignac number, because 56641145465 - 2⁶ = 56641145401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5664114542 + ... + 5664114551.

It is an arithmetic number, because the mean of its divisors is an integer number (16992343641).

Almost surely, 2^56641145465 is an apocalyptic number.

It is an amenable number.

56641145465 is a deficient number, since it is larger than the sum of its proper divisors (11328229099).

56641145465 is a wasteful number, since it uses less digits than its factorization.

56641145465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11328229098.

The product of its digits is 1728000, while the sum is 47.

The spelling of 56641145465 in words is "fifty-six billion, six hundred forty-one million, one hundred forty-five thousand, four hundred sixty-five".