18361165377 has 8 divisors (see below), whose sum is σ = 24482645280. Its totient is φ = 12240231200.

The previous prime is 18361165363. The next prime is 18361165379. The reversal of 18361165377 is 77356116381.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18361165377 - 2¹⁵ = 18361132609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18361165379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50124 + ... + 198077.

It is an arithmetic number, because the mean of its divisors is an integer number (3060330660).

Almost surely, 2^18361165377 is an apocalyptic number.

It is an amenable number.

18361165377 is a deficient number, since it is larger than the sum of its proper divisors (6121479903).

18361165377 is a wasteful number, since it uses less digits than its factorization.

18361165377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272863.

The product of its digits is 635040, while the sum is 48.

The spelling of 18361165377 in words is "eighteen billion, three hundred sixty-one million, one hundred sixty-five thousand, three hundred seventy-seven".