51381573232632 has 32 divisors (see below), whose sum is σ = 128492776320000. Its totient is φ = 17122011979104.

The previous prime is 51381573232567. The next prime is 51381573232637. The reversal of 51381573232632 is 23623237518315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51381573232637) 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, 323612632 + ... + 323771367.

It is an arithmetic number, because the mean of its divisors is an integer number (4015399260000).

Almost surely, 2^{51381573232632} is an apocalyptic number.

It is an amenable number.

51381573232632 is an abundant number, since it is smaller than the sum of its proper divisors (77111203087368).

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

51381573232632 is a wasteful number, since it uses less digits than its factorization.

51381573232632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647387315 (or 647387311 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 51.

The spelling of 51381573232632 in words is "fifty-one trillion, three hundred eighty-one billion, five hundred seventy-three million, two hundred thirty-two thousand, six hundred thirty-two".