5577128257 has 4 divisors (see below), whose sum is σ = 5578673796. Its totient is φ = 5575582720.

The previous prime is 5577128233. The next prime is 5577128281. The reversal of 5577128257 is 7528217755.

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

It is an interprime number because it is at equal distance from previous prime (5577128233) and next prime (5577128281).

It can be written as a sum of positive squares in 2 ways, for example, as 318122896 + 5259005361 = 17836^2 + 72519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5577128257 is a prime.

It is a super-2 number, since 2×5577128257² = 62208719190055716098, which contains 22 as substring.

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 5577128257.

It is not an unprimeable number, because it can be changed into a prime (5577128057) 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, 767344 + ... + 774577.

It is an arithmetic number, because the mean of its divisors is an integer number (1394668449).

Almost surely, 2^5577128257 is an apocalyptic number.

It is an amenable number.

5577128257 is a deficient number, since it is larger than the sum of its proper divisors (1545539).

5577128257 is a wasteful number, since it uses less digits than its factorization.

5577128257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545538.

The product of its digits is 1372000, while the sum is 49.

The square root of 5577128257 is about 74680.1731184389. The cubic root of 5577128257 is about 1773.3870960445.

The spelling of 5577128257 in words is "five billion, five hundred seventy-seven million, one hundred twenty-eight thousand, two hundred fifty-seven".