50218721280 has 896 divisors, whose sum is σ = 220187520000. Its totient is φ = 10574364672.

The previous prime is 50218721261. The next prime is 50218721309. The reversal of 50218721280 is 8212781205.

50218721280 is a `hidden beast` number, since 502 + 1 + 8 + 72 + 1 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (896).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 100638471 + ... + 100638969.

It is an arithmetic number, because the mean of its divisors is an integer number (245745000).

Almost surely, 2^50218721280 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 50218721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110093760000).

50218721280 is an abundant number, since it is smaller than the sum of its proper divisors (169968798720).

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

50218721280 is a wasteful number, since it uses less digits than its factorization.

50218721280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 50218721280 in words is "fifty billion, two hundred eighteen million, seven hundred twenty-one thousand, two hundred eighty".