50278778880 has 768 divisors, whose sum is σ = 190207180800. Its totient is φ = 11206656000.

The previous prime is 50278778873. The next prime is 50278778903. The reversal of 50278778880 is 8887787205.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 263239585 + ... + 263239775.

It is an arithmetic number, because the mean of its divisors is an integer number (247665600).

Almost surely, 2^50278778880 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 50278778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95103590400).

50278778880 is an abundant number, since it is smaller than the sum of its proper divisors (139928401920).

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

50278778880 is a wasteful number, since it uses less digits than its factorization.

50278778880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 14049280, while the sum is 60.

The spelling of 50278778880 in words is "fifty billion, two hundred seventy-eight million, seven hundred seventy-eight thousand, eight hundred eighty".