26401513751525 has 36 divisors (see below), whose sum is σ = 36040228965216. Its totient is φ = 19171422362400.

The previous prime is 26401513751521. The next prime is 26401513751563. The reversal of 26401513751525 is 52515731510462.

It is not a de Polignac number, because 26401513751525 - 2² = 26401513751521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26401513751525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26401513751521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4787627 + ... + 8701976.

It is an arithmetic number, because the mean of its divisors is an integer number (1001117471256).

Almost surely, 2^{26401513751525} is an apocalyptic number.

26401513751525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26401513751525 is a deficient number, since it is larger than the sum of its proper divisors (9638715213691).

26401513751525 is a wasteful number, since it uses less digits than its factorization.

26401513751525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13490282 (or 13490266 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 47.

The spelling of 26401513751525 in words is "twenty-six trillion, four hundred one billion, five hundred thirteen million, seven hundred fifty-one thousand, five hundred twenty-five".