26649079491 has 4 divisors (see below), whose sum is σ = 35532105992. Its totient is φ = 17766052992.

The previous prime is 26649079463. The next prime is 26649079493. The reversal of 26649079491 is 19497094662.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26649079491 - 2²⁵ = 26615525059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26649079493) 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 3 ways as a sum of consecutive naturals, for example, 4441513246 + ... + 4441513251.

It is an arithmetic number, because the mean of its divisors is an integer number (8883026498).

Almost surely, 2^26649079491 is an apocalyptic number.

26649079491 is a deficient number, since it is larger than the sum of its proper divisors (8883026501).

26649079491 is an equidigital number, since it uses as much as digits as its factorization.

26649079491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8883026500.

The product of its (nonzero) digits is 5878656, while the sum is 57.

The spelling of 26649079491 in words is "twenty-six billion, six hundred forty-nine million, seventy-nine thousand, four hundred ninety-one".