18140191625 has 32 divisors (see below), whose sum is σ = 23053455360. Its totient is φ = 14247120000.

The previous prime is 18140191591. The next prime is 18140191669. The reversal of 18140191625 is 52619104181.

It is a happy number.

It is not a de Polignac number, because 18140191625 - 2¹⁶ = 18140126089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8487557 + ... + 8489693.

It is an arithmetic number, because the mean of its divisors is an integer number (720420480).

Almost surely, 2^18140191625 is an apocalyptic number.

It is an amenable number.

18140191625 is a deficient number, since it is larger than the sum of its proper divisors (4913263735).

18140191625 is a wasteful number, since it uses less digits than its factorization.

18140191625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3352 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The spelling of 18140191625 in words is "eighteen billion, one hundred forty million, one hundred ninety-one thousand, six hundred twenty-five".