26944660465 has 4 divisors (see below), whose sum is σ = 32333592564. Its totient is φ = 21555728368.

The previous prime is 26944660453. The next prime is 26944660469. The reversal of 26944660465 is 56406644962.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56406644962 = 2 ⋅28203322481.

It can be written as a sum of positive squares in 2 ways, for example, as 19156774464 + 7787886001 = 138408^2 + 88249^2 .

It is a cyclic number.

It is not a de Polignac number, because 26944660465 - 2⁹ = 26944659953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26944660469) 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, 2694466042 + ... + 2694466051.

It is an arithmetic number, because the mean of its divisors is an integer number (8083398141).

Almost surely, 2^26944660465 is an apocalyptic number.

It is an amenable number.

26944660465 is a deficient number, since it is larger than the sum of its proper divisors (5388932099).

26944660465 is an equidigital number, since it uses as much as digits as its factorization.

26944660465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388932098.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 26944660465 in words is "twenty-six billion, nine hundred forty-four million, six hundred sixty thousand, four hundred sixty-five".