26245442161 has 4 divisors (see below), whose sum is σ = 26803855872. Its totient is φ = 25687028452.

The previous prime is 26245442141. The next prime is 26245442213. The reversal of 26245442161 is 16124454262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26245442161 - 2²³ = 26237053553 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 26245442161.

It is not an unprimeable number, because it can be changed into a prime (26245442141) 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 3 ways as a sum of consecutive naturals, for example, 279206785 + ... + 279206878.

It is an arithmetic number, because the mean of its divisors is an integer number (6700963968).

Almost surely, 2^26245442161 is an apocalyptic number.

It is an amenable number.

26245442161 is a deficient number, since it is larger than the sum of its proper divisors (558413711).

26245442161 is an equidigital number, since it uses as much as digits as its factorization.

26245442161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558413710.

The product of its digits is 92160, while the sum is 37.

The spelling of 26245442161 in words is "twenty-six billion, two hundred forty-five million, four hundred forty-two thousand, one hundred sixty-one".