50787738918 has 192 divisors, whose sum is σ = 139816834560. Its totient is φ = 12988394496.

The previous prime is 50787738821. The next prime is 50787738919. The reversal of 50787738918 is 81983778705.

50787738918 is a `hidden beast` number, since 507 + 8 + 7 + 7 + 38 + 91 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50787738919) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4155805 + ... + 4168007.

It is an arithmetic number, because the mean of its divisors is an integer number (728212680).

Almost surely, 2^50787738918 is an apocalyptic number.

50787738918 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 50787738918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69908417280).

50787738918 is an abundant number, since it is smaller than the sum of its proper divisors (89029095642).

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

50787738918 is a wasteful number, since it uses less digits than its factorization.

50787738918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12331 (or 12328 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 63.

The spelling of 50787738918 in words is "fifty billion, seven hundred eighty-seven million, seven hundred thirty-eight thousand, nine hundred eighteen".