26408252149 has 4 divisors (see below), whose sum is σ = 27961678764. Its totient is φ = 24854825536.

The previous prime is 26408252147. The next prime is 26408252197. The reversal of 26408252149 is 94125280462.

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 13833993924 + 12574258225 = 117618^2 + 112135^2 .

It is a cyclic number.

It is not a de Polignac number, because 26408252149 - 2¹ = 26408252147 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 (26408252147) 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 3 ways as a sum of consecutive naturals, for example, 776713282 + ... + 776713315.

It is an arithmetic number, because the mean of its divisors is an integer number (6990419691).

Almost surely, 2^26408252149 is an apocalyptic number.

It is an amenable number.

26408252149 is a deficient number, since it is larger than the sum of its proper divisors (1553426615).

26408252149 is a wasteful number, since it uses less digits than its factorization.

26408252149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553426614.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 26408252149 in words is "twenty-six billion, four hundred eight million, two hundred fifty-two thousand, one hundred forty-nine".