50891859456 has 80 divisors (see below), whose sum is σ = 136337256000. Its totient is φ = 16869091328.

The previous prime is 50891859419. The next prime is 50891859521. The reversal of 50891859456 is 65495819805.

It is a self number, because there is not a number n which added to its sum of digits gives 50891859456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182395 + ... + 367493.

It is an arithmetic number, because the mean of its divisors is an integer number (1704215700).

Almost surely, 2^50891859456 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 50891859456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68168628000).

50891859456 is an abundant number, since it is smaller than the sum of its proper divisors (85445396544).

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

50891859456 is a wasteful number, since it uses less digits than its factorization.

50891859456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185299 (or 185283 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 60.

The spelling of 50891859456 in words is "fifty billion, eight hundred ninety-one million, eight hundred fifty-nine thousand, four hundred fifty-six".