18119577165 has 16 divisors (see below), whose sum is σ = 29000801088. Its totient is φ = 9660615296.

The previous prime is 18119577163. The next prime is 18119577167. The reversal of 18119577165 is 56177591181.

It is an interprime number because it is at equal distance from previous prime (18119577163) and next prime (18119577167).

It is a cyclic number.

It is not a de Polignac number, because 18119577165 - 2¹ = 18119577163 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119577163) 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, 149664 + ... + 242153.

It is an arithmetic number, because the mean of its divisors is an integer number (1812550068).

Almost surely, 2^18119577165 is an apocalyptic number.

18119577165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18119577165 is a deficient number, since it is larger than the sum of its proper divisors (10881223923).

18119577165 is a wasteful number, since it uses less digits than its factorization.

18119577165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394908.

The product of its digits is 529200, while the sum is 51.

The spelling of 18119577165 in words is "eighteen billion, one hundred nineteen million, five hundred seventy-seven thousand, one hundred sixty-five".