18181790495245 has 32 divisors (see below), whose sum is σ = 24733549209600. Its totient is φ = 12719673575424.

The previous prime is 18181790495191. The next prime is 18181790495261. The reversal of 18181790495245 is 54259409718181.

It is a cyclic number.

It is not a de Polignac number, because 18181790495245 - 2⁷ = 18181790495117 is a prime.

It is a super-2 number, since 2×18181790495245² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111722004 + ... + 111884626.

It is an arithmetic number, because the mean of its divisors is an integer number (772923412800).

Almost surely, 2^{18181790495245} is an apocalyptic number.

It is an amenable number.

18181790495245 is a deficient number, since it is larger than the sum of its proper divisors (6551758714355).

18181790495245 is a wasteful number, since it uses less digits than its factorization.

18181790495245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253189.

The product of its (nonzero) digits is 29030400, while the sum is 64.

The spelling of 18181790495245 in words is "eighteen trillion, one hundred eighty-one billion, seven hundred ninety million, four hundred ninety-five thousand, two hundred forty-five".