81254154195 has 12 divisors (see below), whose sum is σ = 140840534016. Its totient is φ = 43335548880.

The previous prime is 81254154169. The next prime is 81254154211. The reversal of 81254154195 is 59145145218.

81254154195 is a `hidden beast` number, since 8 + 12 + 5 + 4 + 1 + 541 + 95 = 666.

It is not a de Polignac number, because 81254154195 - 2⁷ = 81254154067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1805647871 = 81254154195 / (8 + 1 + 2 + 5 + 4 + 1 + 5 + 4 + 1 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 81254154195.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 902823891 + ... + 902823980.

It is an arithmetic number, because the mean of its divisors is an integer number (11736711168).

Almost surely, 2^81254154195 is an apocalyptic number.

81254154195 is a deficient number, since it is larger than the sum of its proper divisors (59586379821).

81254154195 is a wasteful number, since it uses less digits than its factorization.

81254154195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805647882 (or 1805647879 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The spelling of 81254154195 in words is "eighty-one billion, two hundred fifty-four million, one hundred fifty-four thousand, one hundred ninety-five".