81252175095 has 288 divisors, whose sum is σ = 185214242304. Its totient is φ = 32598720000.

The previous prime is 81252175093. The next prime is 81252175099. The reversal of 81252175095 is 59057125218.

81252175095 is a `hidden beast` number, since 8 + 125 + 2 + 17 + 509 + 5 = 666.

It is not a de Polignac number, because 81252175095 - 2¹ = 81252175093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 81252175095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81252175093) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 165482800 + ... + 165483290.

It is an arithmetic number, because the mean of its divisors is an integer number (643105008).

Almost surely, 2^81252175095 is an apocalyptic number.

81252175095 is an abundant number, since it is smaller than the sum of its proper divisors (103962067209).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81252175095 is a wasteful number, since it uses less digits than its factorization.

81252175095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The spelling of 81252175095 in words is "eighty-one billion, two hundred fifty-two million, one hundred seventy-five thousand, ninety-five".