18140806657 has 8 divisors (see below), whose sum is σ = 18231443712. Its totient is φ = 18050214000.

The previous prime is 18140806603. The next prime is 18140806751. The reversal of 18140806657 is 75660804181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18140806657 - 2²³ = 18132418049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18140806157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064907 + ... + 1081807.

It is an arithmetic number, because the mean of its divisors is an integer number (2278930464).

Almost surely, 2^18140806657 is an apocalyptic number.

It is an amenable number.

18140806657 is a deficient number, since it is larger than the sum of its proper divisors (90637055).

18140806657 is a wasteful number, since it uses less digits than its factorization.

18140806657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22199.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 18140806657 in words is "eighteen billion, one hundred forty million, eight hundred six thousand, six hundred fifty-seven".