26391953539 has 4 divisors (see below), whose sum is σ = 30162232624. Its totient is φ = 22621674456.

The previous prime is 26391953521. The next prime is 26391953551. The reversal of 26391953539 is 93535919362.

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 26391953539 - 2²⁵ = 26358399107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26391953539.

It is not an unprimeable number, because it can be changed into a prime (26391953579) 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, 1885139532 + ... + 1885139545.

It is an arithmetic number, because the mean of its divisors is an integer number (7540558156).

Almost surely, 2^26391953539 is an apocalyptic number.

26391953539 is a deficient number, since it is larger than the sum of its proper divisors (3770279085).

26391953539 is an equidigital number, since it uses as much as digits as its factorization.

26391953539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770279084.

The product of its digits is 5904900, while the sum is 55.

The spelling of 26391953539 in words is "twenty-six billion, three hundred ninety-one million, nine hundred fifty-three thousand, five hundred thirty-nine".