25782607838 has 16 divisors (see below), whose sum is σ = 41652050496. Its totient is φ = 11898744480.

The previous prime is 25782607819. The next prime is 25782607841. The reversal of 25782607838 is 83870628752.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397643 + ... + 457913.

It is an arithmetic number, because the mean of its divisors is an integer number (2603253156).

Almost surely, 2^25782607838 is an apocalyptic number.

25782607838 is a deficient number, since it is larger than the sum of its proper divisors (15869442658).

25782607838 is a wasteful number, since it uses less digits than its factorization.

25782607838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76739.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 25782607838 in words is "twenty-five billion, seven hundred eighty-two million, six hundred seven thousand, eight hundred thirty-eight".