80557049 has 4 divisors (see below), whose sum is σ = 80754420. Its totient is φ = 80359680.

The previous prime is 80557031. The next prime is 80557051. The reversal of 80557049 is 94075508.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40005625 + 40551424 = 6325^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 80557049 - 2⁸ = 80556793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80557069) 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, 98072 + ... + 98889.

It is an arithmetic number, because the mean of its divisors is an integer number (20188605).

Almost surely, 2^80557049 is an apocalyptic number.

It is an amenable number.

80557049 is a deficient number, since it is larger than the sum of its proper divisors (197371).

80557049 is a wasteful number, since it uses less digits than its factorization.

80557049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197370.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 80557049 is about 8975.3578758733. The cubic root of 80557049 is about 431.8847304053.

The spelling of 80557049 in words is "eighty million, five hundred fifty-seven thousand, forty-nine".