518161512 has 64 divisors (see below), whose sum is σ = 1427232960. Its totient is φ = 155456000.

The previous prime is 518161499. The next prime is 518161571. The reversal of 518161512 is 215161815.

It is a super-2 number, since 2×518161512² = 536982705036252288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 518161512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16948 + ... + 36380.

It is an arithmetic number, because the mean of its divisors is an integer number (22300515).

Almost surely, 2^518161512 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 518161512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713616480).

518161512 is an abundant number, since it is smaller than the sum of its proper divisors (909071448).

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

518161512 is a wasteful number, since it uses less digits than its factorization.

518161512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19554 (or 19550 counting only the distinct ones).

The product of its digits is 2400, while the sum is 30.

The square root of 518161512 is about 22763.1612918768. The cubic root of 518161512 is about 803.1963331433.

The spelling of 518161512 in words is "five hundred eighteen million, one hundred sixty-one thousand, five hundred twelve".