25938868786 has 4 divisors (see below), whose sum is σ = 38908303182. Its totient is φ = 12969434392.

The previous prime is 25938868771. The next prime is 25938868811. The reversal of 25938868786 is 68786883952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16321340025 + 9617528761 = 127755^2 + 98069^2 .

It is a super-2 number, since 2×25938868786² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6484717195 + ... + 6484717198.

Almost surely, 2^25938868786 is an apocalyptic number.

25938868786 is a deficient number, since it is larger than the sum of its proper divisors (12969434396).

25938868786 is a wasteful number, since it uses less digits than its factorization.

25938868786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12969434395.

The product of its digits is 278691840, while the sum is 70.

The spelling of 25938868786 in words is "twenty-five billion, nine hundred thirty-eight million, eight hundred sixty-eight thousand, seven hundred eighty-six".