80915786213 has 2 divisors, whose sum is σ = 80915786214. Its totient is φ = 80915786212.

The previous prime is 80915786197. The next prime is 80915786219. The reversal of 80915786213 is 31268751908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77240638084 + 3675148129 = 277922^2 + 60623^2 .

It is a cyclic number.

It is not a de Polignac number, because 80915786213 - 2⁴ = 80915786197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80915786219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40457893106 + 40457893107.

It is an arithmetic number, because the mean of its divisors is an integer number (40457893107).

Almost surely, 2^80915786213 is an apocalyptic number.

It is an amenable number.

80915786213 is a deficient number, since it is larger than the sum of its proper divisors (1).

80915786213 is an equidigital number, since it uses as much as digits as its factorization.

80915786213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 80915786213 in words is "eighty billion, nine hundred fifteen million, seven hundred eighty-six thousand, two hundred thirteen".