18156685011 has 8 divisors (see below), whose sum is σ = 24209840064. Its totient is φ = 12103993320.

The previous prime is 18156685007. The next prime is 18156685013. The reversal of 18156685011 is 11058665181.

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

It is not a de Polignac number, because 18156685011 - 2² = 18156685007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18156685013) 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, 10801 + ... + 190866.

It is an arithmetic number, because the mean of its divisors is an integer number (3026230008).

Almost surely, 2^18156685011 is an apocalyptic number.

18156685011 is a deficient number, since it is larger than the sum of its proper divisors (6053155053).

18156685011 is a wasteful number, since it uses less digits than its factorization.

18156685011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231681.

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 18156685011 in words is "eighteen billion, one hundred fifty-six million, six hundred eighty-five thousand, eleven".