26434120191 has 16 divisors (see below), whose sum is σ = 35617257984. Its totient is φ = 17436950784.

The previous prime is 26434120189. The next prime is 26434120211. The reversal of 26434120191 is 19102143462.

It is not a de Polignac number, because 26434120191 - 2¹ = 26434120189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26434120151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1682016 + ... + 1697658.

It is an arithmetic number, because the mean of its divisors is an integer number (2226078624).

Almost surely, 2^26434120191 is an apocalyptic number.

26434120191 is a deficient number, since it is larger than the sum of its proper divisors (9183137793).

26434120191 is a wasteful number, since it uses less digits than its factorization.

26434120191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21550.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 26434120191 in words is "twenty-six billion, four hundred thirty-four million, one hundred twenty thousand, one hundred ninety-one".