81011532473822 has 16 divisors (see below), whose sum is σ = 128673123661440. Its totient is φ = 38120778236928.

The previous prime is 81011532473623. The next prime is 81011532473897. The reversal of 81011532473822 is 22837423511018.

It is a congruent number.

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, 71172947 + ... + 72302222.

It is an arithmetic number, because the mean of its divisors is an integer number (8042070228840).

Almost surely, 2^{81011532473822} is an apocalyptic number.

81011532473822 is a deficient number, since it is larger than the sum of its proper divisors (47661591187618).

81011532473822 is a wasteful number, since it uses less digits than its factorization.

81011532473822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143491795.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 81011532473822 in words is "eighty-one trillion, eleven billion, five hundred thirty-two million, four hundred seventy-three thousand, eight hundred twenty-two".