81675352522 has 16 divisors (see below), whose sum is σ = 122675124744. Its totient is φ = 40783680000.

The previous prime is 81675352513. The next prime is 81675352559. The reversal of 81675352522 is 22525357618.

It is a Cunningham number, because it is equal to 285789²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 135978921 + 81539373601 = 11661^2 + 285551^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5712022 + ... + 5726302.

Almost surely, 2^81675352522 is an apocalyptic number.

81675352522 is a deficient number, since it is larger than the sum of its proper divisors (40999772222).

81675352522 is a wasteful number, since it uses less digits than its factorization.

81675352522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17865.

The product of its digits is 1008000, while the sum is 46.

The spelling of 81675352522 in words is "eighty-one billion, six hundred seventy-five million, three hundred fifty-two thousand, five hundred twenty-two".