2577261157 has 8 divisors (see below), whose sum is σ = 2627066520. Its totient is φ = 2527499520.

The previous prime is 2577261143. The next prime is 2577261179. The reversal of 2577261157 is 7511627752.

It can be written as a sum of positive squares in 4 ways, for example, as 132848676 + 2444412481 = 11526^2 + 49441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2577261157 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 (2577261857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123969 + ... + 143257.

It is an arithmetic number, because the mean of its divisors is an integer number (328383315).

Almost surely, 2^2577261157 is an apocalyptic number.

It is an amenable number.

2577261157 is a deficient number, since it is larger than the sum of its proper divisors (49805363).

2577261157 is a wasteful number, since it uses less digits than its factorization.

2577261157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21863.

The product of its digits is 205800, while the sum is 43.

The square root of 2577261157 is about 50766.7327784643. The cubic root of 2577261157 is about 1371.0484731456.

The spelling of 2577261157 in words is "two billion, five hundred seventy-seven million, two hundred sixty-one thousand, one hundred fifty-seven".