2568938957 has 4 divisors (see below), whose sum is σ = 2766549660. Its totient is φ = 2371328256.

The previous prime is 2568938899. The next prime is 2568939007. The reversal of 2568938957 is 7598398652.

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 725009476 + 1843929481 = 26926^2 + 42941^2 .

It is a cyclic number.

It is not a de Polignac number, because 2568938957 - 2¹⁰ = 2568937933 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 2568938957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568938257) 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, 98805332 + ... + 98805357.

It is an arithmetic number, because the mean of its divisors is an integer number (691637415).

Almost surely, 2^2568938957 is an apocalyptic number.

It is an amenable number.

2568938957 is a deficient number, since it is larger than the sum of its proper divisors (197610703).

2568938957 is a wasteful number, since it uses less digits than its factorization.

2568938957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197610702.

The product of its digits is 32659200, while the sum is 62.

The square root of 2568938957 is about 50684.7014097943. The cubic root of 2568938957 is about 1369.5711370084.

It can be divided in two parts, 25689 and 38957, that added together give a palindrome (64646).

The spelling of 2568938957 in words is "two billion, five hundred sixty-eight million, nine hundred thirty-eight thousand, nine hundred fifty-seven".