81546230822 has 32 divisors (see below), whose sum is σ = 141855954240. Its totient is φ = 34436327040.

The previous prime is 81546230807. The next prime is 81546230851. The reversal of 81546230822 is 22803264518.

It is a super-2 number, since 2×81546230822² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81546230822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128588 + ... + 423824.

It is an arithmetic number, because the mean of its divisors is an integer number (4432998570).

Almost surely, 2^81546230822 is an apocalyptic number.

81546230822 is a deficient number, since it is larger than the sum of its proper divisors (60309723418).

81546230822 is a wasteful number, since it uses less digits than its factorization.

81546230822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295536.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 81546230822 in words is "eighty-one billion, five hundred forty-six million, two hundred thirty thousand, eight hundred twenty-two".