51645523113 has 48 divisors (see below), whose sum is σ = 81447163200. Its totient is φ = 31422038400.

The previous prime is 51645523073. The next prime is 51645523117. The reversal of 51645523113 is 31132554615.

51645523113 is a `hidden beast` number, since 5 + 1 + 64 + 552 + 31 + 13 = 666.

It is not a de Polignac number, because 51645523113 - 2⁸ = 51645522857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51645523117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 598618 + ... + 679436.

It is an arithmetic number, because the mean of its divisors is an integer number (1696815900).

Almost surely, 2^51645523113 is an apocalyptic number.

It is an amenable number.

51645523113 is a deficient number, since it is larger than the sum of its proper divisors (29801640087).

51645523113 is a wasteful number, since it uses less digits than its factorization.

51645523113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80982 (or 80979 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 51645523113 in words is "fifty-one billion, six hundred forty-five million, five hundred twenty-three thousand, one hundred thirteen".