56373734661 has 16 divisors (see below), whose sum is σ = 77626771200. Its totient is φ = 36369563648.

The previous prime is 56373734657. The next prime is 56373734671. The reversal of 56373734661 is 16643737365.

It is a cyclic number.

It is not a de Polignac number, because 56373734661 - 2² = 56373734657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56373734671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2233596 + ... + 2258693.

It is an arithmetic number, because the mean of its divisors is an integer number (4851673200).

Almost surely, 2^56373734661 is an apocalyptic number.

It is an amenable number.

56373734661 is a deficient number, since it is larger than the sum of its proper divisors (21253036539).

56373734661 is a wasteful number, since it uses less digits than its factorization.

56373734661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492428.

The product of its digits is 5715360, while the sum is 51.

The spelling of 56373734661 in words is "fifty-six billion, three hundred seventy-three million, seven hundred thirty-four thousand, six hundred sixty-one".