26305691191 has 8 divisors (see below), whose sum is σ = 28387383584. Its totient is φ = 24232309920.

The previous prime is 26305691189. The next prime is 26305691227. The reversal of 26305691191 is 19119650362.

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

It is not a de Polignac number, because 26305691191 - 2¹ = 26305691189 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 (26305691131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071200 + ... + 2083861.

It is an arithmetic number, because the mean of its divisors is an integer number (3548422948).

Almost surely, 2^26305691191 is an apocalyptic number.

26305691191 is a deficient number, since it is larger than the sum of its proper divisors (2081692393).

26305691191 is a wasteful number, since it uses less digits than its factorization.

26305691191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155561.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 26305691191 in words is "twenty-six billion, three hundred five million, six hundred ninety-one thousand, one hundred ninety-one".