51137966984 has 32 divisors (see below), whose sum is σ = 104013103320. Its totient is φ = 23429853696.

The previous prime is 51137966981. The next prime is 51137966989. The reversal of 51137966984 is 48966973115.

51137966984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18585868900 + 32552098084 = 136330^2 + 180422^2 .

It is not an unprimeable number, because it can be changed into a prime (51137966981) 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, 1780319 + ... + 1808814.

Almost surely, 2^51137966984 is an apocalyptic number.

It is an amenable number.

51137966984 is an abundant number, since it is smaller than the sum of its proper divisors (52875136336).

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

51137966984 is a wasteful number, since it uses less digits than its factorization.

51137966984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589289 (or 3589285 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 59.

The spelling of 51137966984 in words is "fifty-one billion, one hundred thirty-seven million, nine hundred sixty-six thousand, nine hundred eighty-four".