80409549391 has 2 divisors, whose sum is σ = 80409549392. Its totient is φ = 80409549390.

The previous prime is 80409549343. The next prime is 80409549401. The reversal of 80409549391 is 19394590408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80409549391 - 2¹¹ = 80409547343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80409549491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40204774695 + 40204774696.

It is an arithmetic number, because the mean of its divisors is an integer number (40204774696).

Almost surely, 2^80409549391 is an apocalyptic number.

80409549391 is a deficient number, since it is larger than the sum of its proper divisors (1).

80409549391 is an equidigital number, since it uses as much as digits as its factorization.

80409549391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 80409549391 in words is "eighty billion, four hundred nine million, five hundred forty-nine thousand, three hundred ninety-one".