80440684589 has 2 divisors, whose sum is σ = 80440684590. Its totient is φ = 80440684588.

The previous prime is 80440684531. The next prime is 80440684603. The reversal of 80440684589 is 98548604408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49621126564 + 30819558025 = 222758^2 + 175555^2 .

It is a cyclic number.

It is not a de Polignac number, because 80440684589 - 2²⁴ = 80423907373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80440684529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40220342294 + 40220342295.

It is an arithmetic number, because the mean of its divisors is an integer number (40220342295).

Almost surely, 2^80440684589 is an apocalyptic number.

It is an amenable number.

80440684589 is a deficient number, since it is larger than the sum of its proper divisors (1).

80440684589 is an equidigital number, since it uses as much as digits as its factorization.

80440684589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 80440684589 in words is "eighty billion, four hundred forty million, six hundred eighty-four thousand, five hundred eighty-nine".