25139668994 has 16 divisors (see below), whose sum is σ = 41142941280. Its totient is φ = 11425649760.

The previous prime is 25139668991. The next prime is 25139668997. The reversal of 25139668994 is 49986693152.

It is an interprime number because it is at equal distance from previous prime (25139668991) and next prime (25139668997).

It is not an unprimeable number, because it can be changed into a prime (25139668991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111302 + ... + 250334.

It is an arithmetic number, because the mean of its divisors is an integer number (2571433830).

Almost surely, 2^25139668994 is an apocalyptic number.

25139668994 is a deficient number, since it is larger than the sum of its proper divisors (16003272286).

25139668994 is a wasteful number, since it uses less digits than its factorization.

25139668994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147265.

The product of its digits is 25194240, while the sum is 62.

The spelling of 25139668994 in words is "twenty-five billion, one hundred thirty-nine million, six hundred sixty-eight thousand, nine hundred ninety-four".