26013649 has 2 divisors, whose sum is σ = 26013650. Its totient is φ = 26013648.

The previous prime is 26013601. The next prime is 26013677. The reversal of 26013649 is 94631062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 4558225 = 4632^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 26013649 - 2¹⁵ = 25980881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26013649.

It is not a weakly prime, because it can be changed into another prime (26016649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13006824 + 13006825.

It is an arithmetic number, because the mean of its divisors is an integer number (13006825).

Almost surely, 2^26013649 is an apocalyptic number.

It is an amenable number.

26013649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26013649 is an equidigital number, since it uses as much as digits as its factorization.

26013649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 26013649 is about 5100.3577325517. The cubic root of 26013649 is about 296.3014376552.

It can be divided in two parts, 26013 and 649, that added together give a palindrome (26662).

The spelling of 26013649 in words is "twenty-six million, thirteen thousand, six hundred forty-nine".