51637884944 has 160 divisors (see below), whose sum is σ = 108817797120. Its totient is φ = 23688806400.

The previous prime is 51637884943. The next prime is 51637884997. The reversal of 51637884944 is 44948873615.

It is a super-2 number, since 2×51637884944² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51637884943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216057977 + ... + 216058215.

It is an arithmetic number, because the mean of its divisors is an integer number (680111232).

Almost surely, 2^51637884944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51637884944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54408898560).

51637884944 is an abundant number, since it is smaller than the sum of its proper divisors (57179912176).

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

51637884944 is a wasteful number, since it uses less digits than its factorization.

51637884944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 563 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 59.

The spelling of 51637884944 in words is "fifty-one billion, six hundred thirty-seven million, eight hundred eighty-four thousand, nine hundred forty-four".