82561681732 has 12 divisors (see below), whose sum is σ = 144521735680. Its totient is φ = 41269757256.

The previous prime is 82561681729. The next prime is 82561681739. The reversal of 82561681732 is 23718616528.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (82561681739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2754132 + ... + 2783947.

Almost surely, 2^82561681732 is an apocalyptic number.

It is an amenable number.

82561681732 is a deficient number, since it is larger than the sum of its proper divisors (61960053948).

82561681732 is a wasteful number, since it uses less digits than its factorization.

82561681732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541810 (or 5541808 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The spelling of 82561681732 in words is "eighty-two billion, five hundred sixty-one million, six hundred eighty-one thousand, seven hundred thirty-two".