51236563732 has 18 divisors (see below), whose sum is σ = 93731921738. Its totient is φ = 24504442512.

The previous prime is 51236563669. The next prime is 51236563733. The reversal of 51236563732 is 23736563215.

It can be written as a sum of positive squares in only one way, i.e., 43116030736 + 8120532996 = 207644^2 + 90114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51236563733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12104823 + ... + 12109054.

Almost surely, 2^51236563732 is an apocalyptic number.

It is an amenable number.

51236563732 is a deficient number, since it is larger than the sum of its proper divisors (42495358006).

51236563732 is a wasteful number, since it uses less digits than its factorization.

51236563732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24213927 (or 24213902 counting only the distinct ones).

The product of its digits is 680400, while the sum is 43.

The spelling of 51236563732 in words is "fifty-one billion, two hundred thirty-six million, five hundred sixty-three thousand, seven hundred thirty-two".