26254502909 has 4 divisors (see below), whose sum is σ = 26294222940. Its totient is φ = 26214782880.

The previous prime is 26254502903. The next prime is 26254503001. The reversal of 26254502909 is 90920545262.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21765100900 + 4489402009 = 147530^2 + 67003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26254502909 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 26254502909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26254502903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19859024 + ... + 19860345.

It is an arithmetic number, because the mean of its divisors is an integer number (6573555735).

Almost surely, 2^26254502909 is an apocalyptic number.

It is an amenable number.

26254502909 is a deficient number, since it is larger than the sum of its proper divisors (39720031).

26254502909 is an equidigital number, since it uses as much as digits as its factorization.

26254502909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39720030.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 26254502909 in words is "twenty-six billion, two hundred fifty-four million, five hundred two thousand, nine hundred nine".