80791857 has 16 divisors (see below), whose sum is σ = 125992000. Its totient is φ = 51026112.

The previous prime is 80791849. The next prime is 80791889. The reversal of 80791857 is 75819708.

It is not a de Polignac number, because 80791857 - 2³ = 80791849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80791807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78232 + ... + 79257.

It is an arithmetic number, because the mean of its divisors is an integer number (7874500).

Almost surely, 2^80791857 is an apocalyptic number.

It is an amenable number.

80791857 is a deficient number, since it is larger than the sum of its proper divisors (45200143).

80791857 is a wasteful number, since it uses less digits than its factorization.

80791857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157517 (or 157511 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 80791857 is about 8988.4290618550. The cubic root of 80791857 is about 432.3039431256.

The spelling of 80791857 in words is "eighty million, seven hundred ninety-one thousand, eight hundred fifty-seven".