26616284391 has 16 divisors (see below), whose sum is σ = 36112653920. Its totient is φ = 17432737920.

The previous prime is 26616284377. The next prime is 26616284393. The reversal of 26616284391 is 19348261662.

It is not a de Polignac number, because 26616284391 - 2⁹ = 26616283879 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 26616284391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26616284393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70845 + ... + 241353.

It is an arithmetic number, because the mean of its divisors is an integer number (2257040870).

Almost surely, 2^26616284391 is an apocalyptic number.

26616284391 is a deficient number, since it is larger than the sum of its proper divisors (9496369529).

26616284391 is a wasteful number, since it uses less digits than its factorization.

26616284391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171426.

The product of its digits is 746496, while the sum is 48.

The spelling of 26616284391 in words is "twenty-six billion, six hundred sixteen million, two hundred eighty-four thousand, three hundred ninety-one".