18166725524 has 24 divisors (see below), whose sum is σ = 32824377600. Its totient is φ = 8788458240.

The previous prime is 18166725523. The next prime is 18166725539. The reversal of 18166725524 is 42552766181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18166725523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688772 + ... + 714660.

It is an arithmetic number, because the mean of its divisors is an integer number (1367682400).

Almost surely, 2^18166725524 is an apocalyptic number.

It is an amenable number.

18166725524 is a deficient number, since it is larger than the sum of its proper divisors (14657652076).

18166725524 is a wasteful number, since it uses less digits than its factorization.

18166725524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31583 (or 31581 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The spelling of 18166725524 in words is "eighteen billion, one hundred sixty-six million, seven hundred twenty-five thousand, five hundred twenty-four".