80690258809 has 2 divisors, whose sum is σ = 80690258810. Its totient is φ = 80690258808.

The previous prime is 80690258791. The next prime is 80690258837. The reversal of 80690258809 is 90885209608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79258014784 + 1432244025 = 281528^2 + 37845^2 .

It is a cyclic number.

It is not a de Polignac number, because 80690258809 - 2⁷ = 80690258681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80690258809.

It is not a weakly prime, because it can be changed into another prime (80690258839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40345129404 + 40345129405.

It is an arithmetic number, because the mean of its divisors is an integer number (40345129405).

Almost surely, 2^80690258809 is an apocalyptic number.

It is an amenable number.

80690258809 is a deficient number, since it is larger than the sum of its proper divisors (1).

80690258809 is an equidigital number, since it uses as much as digits as its factorization.

80690258809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 80690258809 in words is "eighty billion, six hundred ninety million, two hundred fifty-eight thousand, eight hundred nine".