81422095875 has 32 divisors (see below), whose sum is σ = 141377094144. Its totient is φ = 41537064800.

The previous prime is 81422095849. The next prime is 81422095889. The reversal of 81422095875 is 57859022418.

It is not a de Polignac number, because 81422095875 - 2⁸ = 81422095619 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4711497 + ... + 4728746.

It is an arithmetic number, because the mean of its divisors is an integer number (4418034192).

Almost surely, 2^81422095875 is an apocalyptic number.

81422095875 is a deficient number, since it is larger than the sum of its proper divisors (59954998269).

81422095875 is a wasteful number, since it uses less digits than its factorization.

81422095875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440284 (or 9440274 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 81422095875 in words is "eighty-one billion, four hundred twenty-two million, ninety-five thousand, eight hundred seventy-five".