26256613 has 6 divisors (see below), whose sum is σ = 27711654. Its totient is φ = 24874344.

The previous prime is 26256611. The next prime is 26256661. The reversal of 26256613 is 31665262.

It can be written as a sum of positive squares in only one way, i.e., 25735329 + 521284 = 5073^2 + 722^2 .

It is not a de Polignac number, because 26256613 - 2¹ = 26256611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26256611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36006 + ... + 36727.

It is an arithmetic number, because the mean of its divisors is an integer number (4618609).

Almost surely, 2^26256613 is an apocalyptic number.

It is an amenable number.

26256613 is a deficient number, since it is larger than the sum of its proper divisors (1455041).

26256613 is an equidigital number, since it uses as much as digits as its factorization.

26256613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72771 (or 72752 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 26256613 is about 5124.1207050576. The cubic root of 26256613 is about 297.2210524671.

The spelling of 26256613 in words is "twenty-six million, two hundred fifty-six thousand, six hundred thirteen".