181455008997 has 16 divisors (see below), whose sum is σ = 249974423552. Its totient is φ = 116959984560.

The previous prime is 181455008957. The next prime is 181455009023. The reversal of 181455008997 is 799800554181.

It is not a de Polignac number, because 181455008997 - 2⁸ = 181455008741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181455008957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 796393 + ... + 998574.

It is an arithmetic number, because the mean of its divisors is an integer number (15623401472).

Almost surely, 2^181455008997 is an apocalyptic number.

It is an amenable number.

181455008997 is a deficient number, since it is larger than the sum of its proper divisors (68519414555).

181455008997 is a wasteful number, since it uses less digits than its factorization.

181455008997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796088.

The product of its (nonzero) digits is 3628800, while the sum is 57.

The spelling of 181455008997 in words is "one hundred eighty-one billion, four hundred fifty-five million, eight thousand, nine hundred ninety-seven".