50997391872 has 320 divisors, whose sum is σ = 158352150528. Its totient is φ = 14284800000.

The previous prime is 50997391871. The next prime is 50997391897. The reversal of 50997391872 is 27819379905.

It is not an unprimeable number, because it can be changed into a prime (50997391871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163978597 + ... + 163978907.

Almost surely, 2^50997391872 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 50997391872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79176075264).

50997391872 is an abundant number, since it is smaller than the sum of its proper divisors (107354758656).

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

50997391872 is a wasteful number, since it uses less digits than its factorization.

50997391872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 60.

The spelling of 50997391872 in words is "fifty billion, nine hundred ninety-seven million, three hundred ninety-one thousand, eight hundred seventy-two".