26905359149 has 4 divisors (see below), whose sum is σ = 26937893664. Its totient is φ = 26872824636.

The previous prime is 26905359071. The next prime is 26905359233. The reversal of 26905359149 is 94195350962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26905359149 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 26905359149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26905319149) 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, 16266017 + ... + 16267670.

It is an arithmetic number, because the mean of its divisors is an integer number (6734473416).

Almost surely, 2^26905359149 is an apocalyptic number.

It is an amenable number.

26905359149 is a deficient number, since it is larger than the sum of its proper divisors (32534515).

26905359149 is an equidigital number, since it uses as much as digits as its factorization.

26905359149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32534514.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 26905359149 in words is "twenty-six billion, nine hundred five million, three hundred fifty-nine thousand, one hundred forty-nine".