26251390140025 has 24 divisors (see below), whose sum is σ = 34235775270144. Its totient is φ = 19940191627200.

The previous prime is 26251390139999. The next prime is 26251390140029. The reversal of 26251390140025 is 52004109315262.

It is not a de Polignac number, because 26251390140025 - 2⁵ = 26251390139993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26251390140025.

It is not an unprimeable number, because it can be changed into a prime (26251390140029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319513279 + ... + 319595428.

It is an arithmetic number, because the mean of its divisors is an integer number (1426490636256).

Almost surely, 2^{26251390140025} is an apocalyptic number.

26251390140025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26251390140025 is a deficient number, since it is larger than the sum of its proper divisors (7984385130119).

26251390140025 is a wasteful number, since it uses less digits than its factorization.

26251390140025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639108801 (or 639108796 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 26251390140025 its reverse (52004109315262), we get a palindrome (78255499455287).

The spelling of 26251390140025 in words is "twenty-six trillion, two hundred fifty-one billion, three hundred ninety million, one hundred forty thousand, twenty-five".