18149908993453 has 2 divisors, whose sum is σ = 18149908993454. Its totient is φ = 18149908993452.

The previous prime is 18149908993439. The next prime is 18149908993487. The reversal of 18149908993453 is 35439980994181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13312011964969 + 4837897028484 = 3648563^2 + 2199522^2 .

It is a cyclic number.

It is not a de Polignac number, because 18149908993453 - 2⁵ = 18149908993421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18149908903453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9074954496726 + 9074954496727.

It is an arithmetic number, because the mean of its divisors is an integer number (9074954496727).

Almost surely, 2^{18149908993453} is an apocalyptic number.

It is an amenable number.

18149908993453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18149908993453 is an equidigital number, since it uses as much as digits as its factorization.

18149908993453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302330880, while the sum is 73.

The spelling of 18149908993453 in words is "eighteen trillion, one hundred forty-nine billion, nine hundred eight million, nine hundred ninety-three thousand, four hundred fifty-three".