81522341575 has 6 divisors (see below), whose sum is σ = 101087703584. Its totient is φ = 65217873240.

The previous prime is 81522341561. The next prime is 81522341599. The reversal of 81522341575 is 57514322518.

It is not a de Polignac number, because 81522341575 - 2⁹ = 81522341063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1630446807 + ... + 1630446856.

Almost surely, 2^81522341575 is an apocalyptic number.

81522341575 is a deficient number, since it is larger than the sum of its proper divisors (19565362009).

81522341575 is a wasteful number, since it uses less digits than its factorization.

81522341575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260893673 (or 3260893668 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The spelling of 81522341575 in words is "eighty-one billion, five hundred twenty-two million, three hundred forty-one thousand, five hundred seventy-five".