26398785749 has 8 divisors (see below), whose sum is σ = 30437033280. Its totient is φ = 22427286336.

The previous prime is 26398785713. The next prime is 26398785761. The reversal of 26398785749 is 94758789362.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-26398785749 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 (26398785799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16686179 + ... + 16687760.

It is an arithmetic number, because the mean of its divisors is an integer number (3804629160).

Almost surely, 2^26398785749 is an apocalyptic number.

It is an amenable number.

26398785749 is a deficient number, since it is larger than the sum of its proper divisors (4038247531).

26398785749 is a wasteful number, since it uses less digits than its factorization.

26398785749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33374059.

The product of its digits is 182891520, while the sum is 68.

The spelling of 26398785749 in words is "twenty-six billion, three hundred ninety-eight million, seven hundred eighty-five thousand, seven hundred forty-nine".