50720815872 has 180 divisors, whose sum is σ = 157817444400. Its totient is φ = 16171702272.

The previous prime is 50720815867. The next prime is 50720815877. The reversal of 50720815872 is 27851802705.

50720815872 is a `hidden beast` number, since 507 + 20 + 8 + 1 + 58 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (50720815867) and next prime (50720815877).

It is not an unprimeable number, because it can be changed into a prime (50720815877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 423754 + ... + 530102.

It is an arithmetic number, because the mean of its divisors is an integer number (876763580).

Almost surely, 2^50720815872 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 50720815872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78908722200).

50720815872 is an abundant number, since it is smaller than the sum of its proper divisors (107096628528).

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

50720815872 is a wasteful number, since it uses less digits than its factorization.

50720815872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106400 (or 106377 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 50720815872 in words is "fifty billion, seven hundred twenty million, eight hundred fifteen thousand, eight hundred seventy-two".