18099544080251 has 2 divisors, whose sum is σ = 18099544080252. Its totient is φ = 18099544080250.

The previous prime is 18099544080229. The next prime is 18099544080257. The reversal of 18099544080251 is 15208044599081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18099544080251 - 2⁶ = 18099544080187 is a prime.

It is not a weakly prime, because it can be changed into another prime (18099544080257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9049772040125 + 9049772040126.

It is an arithmetic number, because the mean of its divisors is an integer number (9049772040126).

Almost surely, 2^{18099544080251} is an apocalyptic number.

18099544080251 is a deficient number, since it is larger than the sum of its proper divisors (1).

18099544080251 is an equidigital number, since it uses as much as digits as its factorization.

18099544080251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4147200, while the sum is 56.

The spelling of 18099544080251 in words is "eighteen trillion, ninety-nine billion, five hundred forty-four million, eighty thousand, two hundred fifty-one".