81322329092 has 24 divisors (see below), whose sum is σ = 142539204192. Its totient is φ = 40596897600.

The previous prime is 81322329073. The next prime is 81322329113. The reversal of 81322329092 is 29092322318.

It is a super-2 number, since 2×81322329092² (a number of 23 digits) contains 22 as substring.

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, 7300367 + ... + 7311497.

It is an arithmetic number, because the mean of its divisors is an integer number (5939133508).

Almost surely, 2^81322329092 is an apocalyptic number.

It is an amenable number.

81322329092 is a deficient number, since it is larger than the sum of its proper divisors (61216875100).

81322329092 is a wasteful number, since it uses less digits than its factorization.

81322329092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13859 (or 13857 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 81322329092 in words is "eighty-one billion, three hundred twenty-two million, three hundred twenty-nine thousand, ninety-two".