81725796716 has 12 divisors (see below), whose sum is σ = 143432308488. Its totient is φ = 40745137152.

The previous prime is 81725796701. The next prime is 81725796721. The reversal of 81725796716 is 61769752718.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29438741 + ... + 29441516.

It is an arithmetic number, because the mean of its divisors is an integer number (11952692374).

Almost surely, 2^81725796716 is an apocalyptic number.

It is an amenable number.

81725796716 is a deficient number, since it is larger than the sum of its proper divisors (61706511772).

81725796716 is a wasteful number, since it uses less digits than its factorization.

81725796716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58880608 (or 58880606 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 59.

The spelling of 81725796716 in words is "eighty-one billion, seven hundred twenty-five million, seven hundred ninety-six thousand, seven hundred sixteen".