25257678874 has 16 divisors (see below), whose sum is σ = 38390782248. Its totient is φ = 12461524992.

The previous prime is 25257678871. The next prime is 25257678907. The reversal of 25257678874 is 47887675252.

It can be written as a sum of positive squares in 4 ways, for example, as 9150261649 + 16107417225 = 95657^2 + 126915^2 .

It is not an unprimeable number, because it can be changed into a prime (25257678871) 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, 127789 + ... + 258544.

Almost surely, 2^25257678874 is an apocalyptic number.

25257678874 is a deficient number, since it is larger than the sum of its proper divisors (13133103374).

25257678874 is a wasteful number, since it uses less digits than its factorization.

25257678874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386769.

The product of its digits is 52684800, while the sum is 61.

The spelling of 25257678874 in words is "twenty-five billion, two hundred fifty-seven million, six hundred seventy-eight thousand, eight hundred seventy-four".