80806257 has 12 divisors (see below), whose sum is σ = 133394560. Its totient is φ = 46174968.

The previous prime is 80806247. The next prime is 80806279. The reversal of 80806257 is 75260808.

It is not a de Polignac number, because 80806257 - 2¹⁵ = 80773489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80806217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641257 + ... + 641382.

Almost surely, 2^80806257 is an apocalyptic number.

It is an amenable number.

80806257 is a deficient number, since it is larger than the sum of its proper divisors (52588303).

80806257 is a wasteful number, since it uses less digits than its factorization.

80806257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282652 (or 1282649 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 80806257 is about 8989.2300560170. The cubic root of 80806257 is about 432.3296256106.

The spelling of 80806257 in words is "eighty million, eight hundred six thousand, two hundred fifty-seven".