53538621318 has 96 divisors (see below), whose sum is σ = 143081370432. Its totient is φ = 14089248000.

The previous prime is 53538621167. The next prime is 53538621359. The reversal of 53538621318 is 81312683535.

53538621318 is a `hidden beast` number, since 5 + 3 + 5 + 3 + 8 + 621 + 3 + 18 = 666.

53538621318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 719668 + ... + 790568.

It is an arithmetic number, because the mean of its divisors is an integer number (1490430942).

Almost surely, 2^53538621318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53538621318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71540685216).

53538621318 is an abundant number, since it is smaller than the sum of its proper divisors (89542749114).

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

53538621318 is a wasteful number, since it uses less digits than its factorization.

53538621318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71390 (or 71387 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 53538621318 in words is "fifty-three billion, five hundred thirty-eight million, six hundred twenty-one thousand, three hundred eighteen".