51538264654836 has 24 divisors (see below), whose sum is σ = 122294187318240. Its totient is φ = 16888244914912.

The previous prime is 51538264654783. The next prime is 51538264654837. The reversal of 51538264654836 is 63845646283515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538264654837) 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, 36397078851 + ... + 36397080266.

It is an arithmetic number, because the mean of its divisors is an integer number (5095591138260).

Almost surely, 2^{51538264654836} is an apocalyptic number.

It is an amenable number.

51538264654836 is an abundant number, since it is smaller than the sum of its proper divisors (70755922663404).

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

51538264654836 is a wasteful number, since it uses less digits than its factorization.

51538264654836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72794159183 (or 72794159181 counting only the distinct ones).

The product of its digits is 497664000, while the sum is 66.

The spelling of 51538264654836 in words is "fifty-one trillion, five hundred thirty-eight billion, two hundred sixty-four million, six hundred fifty-four thousand, eight hundred thirty-six".