26192500091 has 4 divisors (see below), whose sum is σ = 26196218712. Its totient is φ = 26188781472.

The previous prime is 26192500069. The next prime is 26192500097. The reversal of 26192500091 is 19000529162.

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 26192500091 - 2¹⁸ = 26192237947 is a prime.

It is a super-2 number, since 2×26192500091² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26192500097) 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 3 ways as a sum of consecutive naturals, for example, 1848725 + ... + 1862838.

It is an arithmetic number, because the mean of its divisors is an integer number (6549054678).

Almost surely, 2^26192500091 is an apocalyptic number.

26192500091 is a deficient number, since it is larger than the sum of its proper divisors (3718621).

26192500091 is an equidigital number, since it uses as much as digits as its factorization.

26192500091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718620.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 26192500091 in words is "twenty-six billion, one hundred ninety-two million, five hundred thousand, ninety-one".