26444644461 has 6 divisors (see below), whose sum is σ = 38197819790. Its totient is φ = 17629762968.

The previous prime is 26444644459. The next prime is 26444644481. The reversal of 26444644461 is 16444644462.

It can be written as a sum of positive squares in only one way, i.e., 21547304100 + 4897340361 = 146790^2 + 69981^2 .

It is not a de Polignac number, because 26444644461 - 2¹ = 26444644459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26444644481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1469146906 + ... + 1469146923.

Almost surely, 2^26444644461 is an apocalyptic number.

It is an amenable number.

26444644461 is a deficient number, since it is larger than the sum of its proper divisors (11753175329).

26444644461 is a wasteful number, since it uses less digits than its factorization.

26444644461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938293835 (or 2938293832 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 45.

Subtracting from 26444644461 its reverse (16444644462), we obtain a palindrome (9999999999).

The spelling of 26444644461 in words is "twenty-six billion, four hundred forty-four million, six hundred forty-four thousand, four hundred sixty-one".