51636391132 has 24 divisors (see below), whose sum is σ = 94595784192. Its totient is φ = 24616244400.

The previous prime is 51636391099. The next prime is 51636391133. The reversal of 51636391132 is 23119363615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51636391133) 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, 873744 + ... + 930967.

It is an arithmetic number, because the mean of its divisors is an integer number (3941491008).

Almost surely, 2^51636391132 is an apocalyptic number.

It is an amenable number.

51636391132 is a deficient number, since it is larger than the sum of its proper divisors (42959393060).

51636391132 is a wasteful number, since it uses less digits than its factorization.

51636391132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805049 (or 1805047 counting only the distinct ones).

The product of its digits is 87480, while the sum is 40.

The spelling of 51636391132 in words is "fifty-one billion, six hundred thirty-six million, three hundred ninety-one thousand, one hundred thirty-two".