18165172153 has 2 divisors, whose sum is σ = 18165172154. Its totient is φ = 18165172152.

The previous prime is 18165172147. The next prime is 18165172183. The reversal of 18165172153 is 35127156181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15389146809 + 2776025344 = 124053^2 + 52688^2 .

It is a cyclic number.

It is not a de Polignac number, because 18165172153 - 2⁵ = 18165172121 is a prime.

It is not a weakly prime, because it can be changed into another prime (18165172183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9082586076 + 9082586077.

It is an arithmetic number, because the mean of its divisors is an integer number (9082586077).

Almost surely, 2^18165172153 is an apocalyptic number.

It is an amenable number.

18165172153 is a deficient number, since it is larger than the sum of its proper divisors (1).

18165172153 is an equidigital number, since it uses as much as digits as its factorization.

18165172153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 40.

The spelling of 18165172153 in words is "eighteen billion, one hundred sixty-five million, one hundred seventy-two thousand, one hundred fifty-three".