26117951091 has 4 divisors (see below), whose sum is σ = 34823934792. Its totient is φ = 17411967392.

The previous prime is 26117951059. The next prime is 26117951099. The reversal of 26117951091 is 19015971162.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 26117951091 - 2⁵ = 26117951059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26117951099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4352991846 + ... + 4352991851.

It is an arithmetic number, because the mean of its divisors is an integer number (8705983698).

Almost surely, 2^26117951091 is an apocalyptic number.

26117951091 is a deficient number, since it is larger than the sum of its proper divisors (8705983701).

26117951091 is an equidigital number, since it uses as much as digits as its factorization.

26117951091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8705983700.

The product of its (nonzero) digits is 34020, while the sum is 42.

The spelling of 26117951091 in words is "twenty-six billion, one hundred seventeen million, nine hundred fifty-one thousand, ninety-one".