18156286641 has 16 divisors (see below), whose sum is σ = 25369358976. Its totient is φ = 11528221056.

The previous prime is 18156286607. The next prime is 18156286667. The reversal of 18156286641 is 14668265181.

It is not a de Polignac number, because 18156286641 - 2⁹ = 18156286129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18156286601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548590 + ... + 580743.

It is an arithmetic number, because the mean of its divisors is an integer number (1585584936).

Almost surely, 2^18156286641 is an apocalyptic number.

It is an amenable number.

18156286641 is a deficient number, since it is larger than the sum of its proper divisors (7213072335).

18156286641 is a wasteful number, since it uses less digits than its factorization.

18156286641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129592.

The product of its digits is 552960, while the sum is 48.

The spelling of 18156286641 in words is "eighteen billion, one hundred fifty-six million, two hundred eighty-six thousand, six hundred forty-one".