18156080101 has 16 divisors (see below), whose sum is σ = 19091847168. Its totient is φ = 17232969600.

The previous prime is 18156080081. The next prime is 18156080149. The reversal of 18156080101 is 10108065181.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18156080101 - 2⁷ = 18156079973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18156080161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844545 + ... + 1854361.

It is an arithmetic number, because the mean of its divisors is an integer number (1193240448).

Almost surely, 2^18156080101 is an apocalyptic number.

It is an amenable number.

18156080101 is a deficient number, since it is larger than the sum of its proper divisors (935767067).

18156080101 is a wasteful number, since it uses less digits than its factorization.

18156080101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10452.

The product of its (nonzero) digits is 1920, while the sum is 31.

The spelling of 18156080101 in words is "eighteen billion, one hundred fifty-six million, eighty thousand, one hundred one".