18531799649299 has 2 divisors, whose sum is σ = 18531799649300. Its totient is φ = 18531799649298.

The previous prime is 18531799649261. The next prime is 18531799649329. The reversal of 18531799649299 is 99294699713581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18531799649299 - 2⁷ = 18531799649171 is a prime.

It is a super-3 number, since 3×18531799649299³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18531799649399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265899824649 + 9265899824650.

It is an arithmetic number, because the mean of its divisors is an integer number (9265899824650).

Almost surely, 2^{18531799649299} is an apocalyptic number.

18531799649299 is a deficient number, since it is larger than the sum of its proper divisors (1).

18531799649299 is an equidigital number, since it uses as much as digits as its factorization.

18531799649299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2380855680, while the sum is 82.

The spelling of 18531799649299 in words is "eighteen trillion, five hundred thirty-one billion, seven hundred ninety-nine million, six hundred forty-nine thousand, two hundred ninety-nine".