51715474888 has 64 divisors (see below), whose sum is σ = 121082843520. Its totient is φ = 20117299200.

The previous prime is 51715474883. The next prime is 51715474901. The reversal of 51715474888 is 88847451715.

It is a super-2 number, since 2×51715474888² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51715474883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329370 + ... + 460342.

It is an arithmetic number, because the mean of its divisors is an integer number (1891919430).

Almost surely, 2^51715474888 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 51715474888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60541421760).

51715474888 is an abundant number, since it is smaller than the sum of its proper divisors (69367368632).

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

51715474888 is a wasteful number, since it uses less digits than its factorization.

51715474888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131638 (or 131634 counting only the distinct ones).

The product of its digits is 10035200, while the sum is 58.

The spelling of 51715474888 in words is "fifty-one billion, seven hundred fifteen million, four hundred seventy-four thousand, eight hundred eighty-eight".