51989722615152 has 180 divisors, whose sum is σ = 169292342326536. Its totient is φ = 14850837630720.

The previous prime is 51989722615099. The next prime is 51989722615153. The reversal of 51989722615152 is 25151622798915.

51989722615152 is a `hidden beast` number, since 5 + 1 + 9 + 8 + 9 + 7 + 2 + 2 + 615 + 1 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 51989722615152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51989722615153) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30361263 + ... + 32027889.

Almost surely, 2^{51989722615152} 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 51989722615152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84646171163268).

51989722615152 is an abundant number, since it is smaller than the sum of its proper divisors (117302619711384).

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

51989722615152 is a wasteful number, since it uses less digits than its factorization.

51989722615152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671076 (or 1671060 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 63.

The spelling of 51989722615152 in words is "fifty-one trillion, nine hundred eighty-nine billion, seven hundred twenty-two million, six hundred fifteen thousand, one hundred fifty-two".