26491046791 has 12 divisors (see below), whose sum is σ = 29176214256. Its totient is φ = 24034836320.

The previous prime is 26491046749. The next prime is 26491046809. The reversal of 26491046791 is 19764019462.

It is not a de Polignac number, because 26491046791 - 2⁷ = 26491046663 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 (26491046711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156766 + ... + 278491.

It is an arithmetic number, because the mean of its divisors is an integer number (2431351188).

Almost surely, 2^26491046791 is an apocalyptic number.

26491046791 is a deficient number, since it is larger than the sum of its proper divisors (2685167465).

26491046791 is a wasteful number, since it uses less digits than its factorization.

26491046791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435782 (or 435771 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 26491046791 in words is "twenty-six billion, four hundred ninety-one million, forty-six thousand, seven hundred ninety-one".