80764172591797 has 2 divisors, whose sum is σ = 80764172591798. Its totient is φ = 80764172591796.

The previous prime is 80764172591747. The next prime is 80764172591863. The reversal of 80764172591797 is 79719527146708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63498601897201 + 17265570694596 = 7968601^2 + 4155186^2 .

It is a cyclic number.

It is not a de Polignac number, because 80764172591797 - 2³⁹ = 80214416777909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80764172591737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40382086295898 + 40382086295899.

It is an arithmetic number, because the mean of its divisors is an integer number (40382086295899).

Almost surely, 2^{80764172591797} is an apocalyptic number.

It is an amenable number.

80764172591797 is a deficient number, since it is larger than the sum of its proper divisors (1).

80764172591797 is an equidigital number, since it uses as much as digits as its factorization.

80764172591797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373403520, while the sum is 73.

The spelling of 80764172591797 in words is "eighty trillion, seven hundred sixty-four billion, one hundred seventy-two million, five hundred ninety-one thousand, seven hundred ninety-seven".