80694316889 has 2 divisors, whose sum is σ = 80694316890. Its totient is φ = 80694316888.

The previous prime is 80694316867. The next prime is 80694316921. The reversal of 80694316889 is 98861349608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61805937664 + 18888379225 = 248608^2 + 137435^2 .

It is a cyclic number.

It is not a de Polignac number, because 80694316889 - 2¹² = 80694312793 is a prime.

It is not a weakly prime, because it can be changed into another prime (80694316819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40347158444 + 40347158445.

It is an arithmetic number, because the mean of its divisors is an integer number (40347158445).

Almost surely, 2^80694316889 is an apocalyptic number.

It is an amenable number.

80694316889 is a deficient number, since it is larger than the sum of its proper divisors (1).

80694316889 is an equidigital number, since it uses as much as digits as its factorization.

80694316889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 80694316889 in words is "eighty billion, six hundred ninety-four million, three hundred sixteen thousand, eight hundred eighty-nine".