26117858649 has 8 divisors (see below), whose sum is σ = 34906530112. Its totient is φ = 17370546480.

The previous prime is 26117858609. The next prime is 26117858681. The reversal of 26117858649 is 94685871162.

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

It is not a de Polignac number, because 26117858649 - 2⁷ = 26117858521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26117858609) 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 7 ways as a sum of consecutive naturals, for example, 10338349 + ... + 10340874.

It is an arithmetic number, because the mean of its divisors is an integer number (4363316264).

Almost surely, 2^26117858649 is an apocalyptic number.

It is an amenable number.

26117858649 is a deficient number, since it is larger than the sum of its proper divisors (8788671463).

26117858649 is a wasteful number, since it uses less digits than its factorization.

26117858649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20679647.

The product of its digits is 5806080, while the sum is 57.

The spelling of 26117858649 in words is "twenty-six billion, one hundred seventeen million, eight hundred fifty-eight thousand, six hundred forty-nine".