18161874756 has 45 divisors (see below), whose sum is σ = 47485070479. Its totient is φ = 6053149656.

The previous prime is 18161874739. The next prime is 18161874779. The reversal of 18161874756 is 65747816181.

The square root of 18161874756 is 134766.

It is a perfect power (a square), and thus also a powerful number.

18161874756 is a `hidden beast` number, since 1 + 8 + 161 + 8 + 7 + 475 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2422045 + ... + 2429531.

Almost surely, 2^18161874756 is an apocalyptic number.

18161874756 is the 134766-th square number.

It is an amenable number.

18161874756 is an abundant number, since it is smaller than the sum of its proper divisors (29323195723).

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

18161874756 is an frugal number, since it uses more digits than its factorization.

18161874756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14990 (or 7492 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The spelling of 18161874756 in words is "eighteen billion, one hundred sixty-one million, eight hundred seventy-four thousand, seven hundred fifty-six".