51337423656 has 48 divisors (see below), whose sum is σ = 139054511700. Its totient is φ = 17110547712.

The previous prime is 51337423619. The next prime is 51337423703. The reversal of 51337423656 is 65632473315.

It is a happy number.

51337423656 is a `hidden beast` number, since 513 + 3 + 74 + 2 + 3 + 65 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49084402500 + 2253021156 = 221550^2 + 47466^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697110 + ... + 767226.

Almost surely, 2^51337423656 is an apocalyptic number.

It is an amenable number.

51337423656 is an abundant number, since it is smaller than the sum of its proper divisors (87717088044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51337423656 is a wasteful number, since it uses less digits than its factorization.

51337423656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80298 (or 80291 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 45.

The spelling of 51337423656 in words is "fifty-one billion, three hundred thirty-seven million, four hundred twenty-three thousand, six hundred fifty-six".