81932877652 has 12 divisors (see below), whose sum is σ = 146433228480. Its totient is φ = 40094812376.

The previous prime is 81932877617. The next prime is 81932877673. The reversal of 81932877652 is 25677823918.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217906402 + ... + 217906777.

It is an arithmetic number, because the mean of its divisors is an integer number (12202769040).

Almost surely, 2^81932877652 is an apocalyptic number.

It is an amenable number.

81932877652 is a deficient number, since it is larger than the sum of its proper divisors (64500350828).

81932877652 is a wasteful number, since it uses less digits than its factorization.

81932877652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435813230 (or 435813228 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 58.

The spelling of 81932877652 in words is "eighty-one billion, nine hundred thirty-two million, eight hundred seventy-seven thousand, six hundred fifty-two".