26510625429409 has 27 divisors (see below), whose sum is σ = 29284987860849. Its totient is φ = 23981063833320.

The previous prime is 26510625429383. The next prime is 26510625429413. The reversal of 26510625429409 is 90492452601562.

It is a happy number.

The square root of 26510625429409 is 5148847.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 26510625429409 - 2⁵ = 26510625429377 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 26510625429409.

It is not an unprimeable number, because it can be changed into a prime (26510625429499) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12630120642 + ... + 12630122740.

Almost surely, 2^{26510625429409} is an apocalyptic number.

26510625429409 is the 5148847-th square number.

26510625429409 is the 2574424-th centered octagonal number.

It is an amenable number.

26510625429409 is a deficient number, since it is larger than the sum of its proper divisors (2774362431440).

26510625429409 is an frugal number, since it uses more digits than its factorization.

26510625429409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666 (or 2333 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 26510625429409 in words is "twenty-six trillion, five hundred ten billion, six hundred twenty-five million, four hundred twenty-nine thousand, four hundred nine".