80557157 has 4 divisors (see below), whose sum is σ = 83335020. Its totient is φ = 77779296.

The previous prime is 80557153. The next prime is 80557159. The reversal of 80557157 is 75175508.

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 55145476 + 25411681 = 7426^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 80557157 - 2² = 80557153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80557157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80557153) 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, 1388888 + ... + 1388945.

It is an arithmetic number, because the mean of its divisors is an integer number (20833755).

Almost surely, 2^80557157 is an apocalyptic number.

It is an amenable number.

80557157 is a deficient number, since it is larger than the sum of its proper divisors (2777863).

80557157 is a wasteful number, since it uses less digits than its factorization.

80557157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777862.

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 80557157 is about 8975.3638923444. The cubic root of 80557157 is about 431.8849234094.

The spelling of 80557157 in words is "eighty million, five hundred fifty-seven thousand, one hundred fifty-seven".