1518985172 has 12 divisors (see below), whose sum is σ = 2798130720. Its totient is φ = 719519256.

The previous prime is 1518985133. The next prime is 1518985199. The reversal of 1518985172 is 2715898151.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9993248 + ... + 9993399.

It is an arithmetic number, because the mean of its divisors is an integer number (233177560).

Almost surely, 2^1518985172 is an apocalyptic number.

It is an amenable number.

1518985172 is a deficient number, since it is larger than the sum of its proper divisors (1279145548).

1518985172 is a wasteful number, since it uses less digits than its factorization.

1518985172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19986670 (or 19986668 counting only the distinct ones).

The product of its digits is 201600, while the sum is 47.

The square root of 1518985172 is about 38974.1603116732. The cubic root of 1518985172 is about 1149.5234754120.

The spelling of 1518985172 in words is "one billion, five hundred eighteen million, nine hundred eighty-five thousand, one hundred seventy-two".