26409865649 has 8 divisors (see below), whose sum is σ = 26439110208. Its totient is φ = 26380641040.

The previous prime is 26409865639. The next prime is 26409865697. The reversal of 26409865649 is 94656890462.

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

It is a cyclic number.

It is not a de Polignac number, because 26409865649 - 2¹² = 26409861553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26409865639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720844 + ... + 4726434.

It is an arithmetic number, because the mean of its divisors is an integer number (3304888776).

Almost surely, 2^26409865649 is an apocalyptic number.

It is an amenable number.

26409865649 is a deficient number, since it is larger than the sum of its proper divisors (29244559).

26409865649 is a wasteful number, since it uses less digits than its factorization.

26409865649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9975.

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 26409865649 in words is "twenty-six billion, four hundred nine million, eight hundred sixty-five thousand, six hundred forty-nine".