80764172591705 has 24 divisors (see below), whose sum is σ = 106035048468936. Its totient is φ = 58849036515840.

The previous prime is 80764172591677. The next prime is 80764172591737. The reversal of 80764172591705 is 50719527146708.

It can be written as a sum of positive squares in 4 ways, for example, as 4545266233369 + 76218906358336 = 2131963^2 + 8730344^2 .

It is not a de Polignac number, because 80764172591705 - 2²⁸ = 80763904156249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494281862 + ... + 494445231.

It is an arithmetic number, because the mean of its divisors is an integer number (4418127019539).

Almost surely, 2^{80764172591705} is an apocalyptic number.

80764172591705 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80764172591705 is a deficient number, since it is larger than the sum of its proper divisors (25270875877231).

80764172591705 is a wasteful number, since it uses less digits than its factorization.

80764172591705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988727177 (or 988727146 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 62.

The spelling of 80764172591705 in words is "eighty trillion, seven hundred sixty-four billion, one hundred seventy-two million, five hundred ninety-one thousand, seven hundred five".