53164921218 has 32 divisors (see below), whose sum is σ = 106508313600. Its totient is φ = 17691924096.

The previous prime is 53164921171. The next prime is 53164921247. The reversal of 53164921218 is 81212946135.

It is a super-2 number, since 2×53164921218² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53164921218.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12781023 + ... + 12785181.

It is an arithmetic number, because the mean of its divisors is an integer number (3328384800).

Almost surely, 2^53164921218 is an apocalyptic number.

53164921218 is an abundant number, since it is smaller than the sum of its proper divisors (53343392382).

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

53164921218 is a wasteful number, since it uses less digits than its factorization.

53164921218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226.

The product of its digits is 103680, while the sum is 42.

The spelling of 53164921218 in words is "fifty-three billion, one hundred sixty-four million, nine hundred twenty-one thousand, two hundred eighteen".