81782712596 has 24 divisors (see below), whose sum is σ = 155305528224. Its totient is φ = 37457727840.

The previous prime is 81782712593. The next prime is 81782712679. The reversal of 81782712596 is 69521728718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81782712593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5996030 + ... + 6009653.

It is an arithmetic number, because the mean of its divisors is an integer number (6471063676).

Almost surely, 2^81782712596 is an apocalyptic number.

It is an amenable number.

81782712596 is a deficient number, since it is larger than the sum of its proper divisors (73522815628).

81782712596 is a wasteful number, since it uses less digits than its factorization.

81782712596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12005831 (or 12005829 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 56.

The spelling of 81782712596 in words is "eighty-one billion, seven hundred eighty-two million, seven hundred twelve thousand, five hundred ninety-six".