80056591 has 4 divisors (see below), whose sum is σ = 80080000. Its totient is φ = 80033184.

The previous prime is 80056579. The next prime is 80056607. The reversal of 80056591 is 19565008.

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 80056591 - 2⁹ = 80056079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80056091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5466 + ... + 13783.

It is an arithmetic number, because the mean of its divisors is an integer number (20020000).

Almost surely, 2^80056591 is an apocalyptic number.

80056591 is a deficient number, since it is larger than the sum of its proper divisors (23409).

80056591 is a wasteful number, since it uses less digits than its factorization.

80056591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23408.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 80056591 is about 8947.4348838089. The cubic root of 80056591 is about 430.9885154032.

The spelling of 80056591 in words is "eighty million, fifty-six thousand, five hundred ninety-one".