80578091 has 4 divisors (see below), whose sum is σ = 87903384. Its totient is φ = 73252800.

The previous prime is 80578081. The next prime is 80578093. The reversal of 80578091 is 19087508.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80578091 - 2¹⁴ = 80561707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80578093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3662630 + ... + 3662651.

It is an arithmetic number, because the mean of its divisors is an integer number (21975846).

Almost surely, 2^80578091 is an apocalyptic number.

80578091 is a deficient number, since it is larger than the sum of its proper divisors (7325293).

80578091 is a wasteful number, since it uses less digits than its factorization.

80578091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7325292.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 80578091 is about 8976.5300088620. The cubic root of 80578091 is about 431.9223307869.

The spelling of 80578091 in words is "eighty million, five hundred seventy-eight thousand, ninety-one".