81127443295 has 4 divisors (see below), whose sum is σ = 97352931960. Its totient is φ = 64901954632.

The previous prime is 81127443239. The next prime is 81127443317. The reversal of 81127443295 is 59234472118.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81127443295 - 2⁷ = 81127443167 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8112744325 + ... + 8112744334.

It is an arithmetic number, because the mean of its divisors is an integer number (24338232990).

Almost surely, 2^81127443295 is an apocalyptic number.

81127443295 is a deficient number, since it is larger than the sum of its proper divisors (16225488665).

81127443295 is a wasteful number, since it uses less digits than its factorization.

81127443295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16225488664.

The product of its digits is 483840, while the sum is 46.

The spelling of 81127443295 in words is "eighty-one billion, one hundred twenty-seven million, four hundred forty-three thousand, two hundred ninety-five".