18149677694181 has 24 divisors (see below), whose sum is σ = 28601782582464. Its totient is φ = 10998923717760.

The previous prime is 18149677694117. The next prime is 18149677694221.

It is a happy number.

18149677694181 is a `hidden beast` number, since 1 + 8 + 1 + 496 + 77 + 69 + 4 + 1 + 8 + 1 = 666.

18149677694181 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18149677694181 - 2⁶ = 18149677694117 is a prime.

It is a super-2 number, since 2×18149677694181² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18149677694881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6097761 + ... + 8572166.

It is an arithmetic number, because the mean of its divisors is an integer number (1191740940936).

Almost surely, 2^{18149677694181} is an apocalyptic number.

18149677694181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18149677694181 is a deficient number, since it is larger than the sum of its proper divisors (10452104888283).

18149677694181 is a wasteful number, since it uses less digits than its factorization.

18149677694181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14682441 (or 14682438 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 72.

The spelling of 18149677694181 in words is "eighteen trillion, one hundred forty-nine billion, six hundred seventy-seven million, six hundred ninety-four thousand, one hundred eighty-one".