18180791425 has 12 divisors (see below), whose sum is σ = 22549132656. Its totient is φ = 14541438800.

The previous prime is 18180791399. The next prime is 18180791441. The reversal of 18180791425 is 52419708181.

It is not a de Polignac number, because 18180791425 - 2¹³ = 18180783233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39762 + ... + 194788.

It is an arithmetic number, because the mean of its divisors is an integer number (1879094388).

Almost surely, 2^18180791425 is an apocalyptic number.

It is an amenable number.

18180791425 is a deficient number, since it is larger than the sum of its proper divisors (4368341231).

18180791425 is a wasteful number, since it uses less digits than its factorization.

18180791425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159728 (or 159723 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 18180791425 in words is "eighteen billion, one hundred eighty million, seven hundred ninety-one thousand, four hundred twenty-five".