56405537737 has 16 divisors (see below), whose sum is σ = 58183598592. Its totient is φ = 54658169280.

The previous prime is 56405537729. The next prime is 56405537779. The reversal of 56405537737 is 73773550465.

It is a cyclic number.

It is not a de Polignac number, because 56405537737 - 2³ = 56405537729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56405537707) 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, 1369312 + ... + 1409902.

It is an arithmetic number, because the mean of its divisors is an integer number (3636474912).

Almost surely, 2^56405537737 is an apocalyptic number.

It is an amenable number.

56405537737 is a deficient number, since it is larger than the sum of its proper divisors (1778060855).

56405537737 is a wasteful number, since it uses less digits than its factorization.

56405537737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40968.

The product of its (nonzero) digits is 9261000, while the sum is 52.

The spelling of 56405537737 in words is "fifty-six billion, four hundred five million, five hundred thirty-seven thousand, seven hundred thirty-seven".