81446057895 has 32 divisors (see below), whose sum is σ = 134950302720. Its totient is φ = 41895539840.

The previous prime is 81446057887. The next prime is 81446057929. The reversal of 81446057895 is 59875064418.

It is not a de Polignac number, because 81446057895 - 2³ = 81446057887 is a prime.

It is a congruent number.

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, 313090 + ... + 510800.

It is an arithmetic number, because the mean of its divisors is an integer number (4217196960).

Almost surely, 2^81446057895 is an apocalyptic number.

81446057895 is a deficient number, since it is larger than the sum of its proper divisors (53504244825).

81446057895 is a wasteful number, since it uses less digits than its factorization.

81446057895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198695.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 81446057895 in words is "eighty-one billion, four hundred forty-six million, fifty-seven thousand, eight hundred ninety-five".