81452915165 has 16 divisors (see below), whose sum is σ = 103193238720. Its totient is φ = 61549528320.

The previous prime is 81452915101. The next prime is 81452915179. The reversal of 81452915165 is 56151925418.

It is not a de Polignac number, because 81452915165 - 2⁶ = 81452915101 is a prime.

It is a Smith number, since the sum of its digits (47) 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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240091 + ... + 1304120.

It is an arithmetic number, because the mean of its divisors is an integer number (6449577420).

Almost surely, 2^81452915165 is an apocalyptic number.

It is an amenable number.

81452915165 is a deficient number, since it is larger than the sum of its proper divisors (21740323555).

81452915165 is a wasteful number, since it uses less digits than its factorization.

81452915165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544572.

The product of its digits is 432000, while the sum is 47.

The spelling of 81452915165 in words is "eighty-one billion, four hundred fifty-two million, nine hundred fifteen thousand, one hundred sixty-five".