56624515661 has 8 divisors (see below), whose sum is σ = 64739983680. Its totient is φ = 48515610528.

The previous prime is 56624515613. The next prime is 56624515679. The reversal of 56624515661 is 16651542665.

56624515661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56624515661 - 2³⁴ = 39444646477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56624515601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1622216 + ... + 1656753.

It is an arithmetic number, because the mean of its divisors is an integer number (8092497960).

Almost surely, 2^56624515661 is an apocalyptic number.

It is an amenable number.

56624515661 is a deficient number, since it is larger than the sum of its proper divisors (8115468019).

56624515661 is a wasteful number, since it uses less digits than its factorization.

56624515661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281443.

The product of its digits is 1296000, while the sum is 47.

The spelling of 56624515661 in words is "fifty-six billion, six hundred twenty-four million, five hundred fifteen thousand, six hundred sixty-one".