81932822604 has 18 divisors (see below), whose sum is σ = 207107968340. Its totient is φ = 27310940856.

The previous prime is 81932822579. The next prime is 81932822611. The reversal of 81932822604 is 40622823918.

81932822604 is a `hidden beast` number, since 8 + 1 + 9 + 32 + 8 + 2 + 2 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 81932822604.

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, 1137955834 + ... + 1137955905.

Almost surely, 2^81932822604 is an apocalyptic number.

It is an amenable number.

81932822604 is an abundant number, since it is smaller than the sum of its proper divisors (125175145736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81932822604 is a wasteful number, since it uses less digits than its factorization.

81932822604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275911749 (or 2275911744 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 81932822604 in words is "eighty-one billion, nine hundred thirty-two million, eight hundred twenty-two thousand, six hundred four".