25263887642 has 16 divisors (see below), whose sum is σ = 43398464640. Its totient is φ = 10805144688.

The previous prime is 25263887639. The next prime is 25263887659. The reversal of 25263887642 is 24678836252.

It is an unprimeable number.

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, 1845917 + ... + 1859552.

It is an arithmetic number, because the mean of its divisors is an integer number (2712404040).

Almost surely, 2^25263887642 is an apocalyptic number.

25263887642 is a deficient number, since it is larger than the sum of its proper divisors (18134576998).

25263887642 is a wasteful number, since it uses less digits than its factorization.

25263887642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705965.

The product of its digits is 7741440, while the sum is 53.

The spelling of 25263887642 in words is "twenty-five billion, two hundred sixty-three million, eight hundred eighty-seven thousand, six hundred forty-two".