26653361641 has 4 divisors (see below), whose sum is σ = 26889232212. Its totient is φ = 26417491072.

The previous prime is 26653361599. The next prime is 26653361663. The reversal of 26653361641 is 14616335662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14616335662 = 2 ⋅7308167831.

It can be written as a sum of positive squares in 2 ways, for example, as 13843875600 + 12809486041 = 117660^2 + 113179^2 .

It is a cyclic number.

It is not a de Polignac number, because 26653361641 - 2⁷ = 26653361513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26653361681) 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, 117935116 + ... + 117935341.

It is an arithmetic number, because the mean of its divisors is an integer number (6722308053).

Almost surely, 2^26653361641 is an apocalyptic number.

It is an amenable number.

26653361641 is a deficient number, since it is larger than the sum of its proper divisors (235870571).

26653361641 is a wasteful number, since it uses less digits than its factorization.

26653361641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235870570.

The product of its digits is 466560, while the sum is 43.

The spelling of 26653361641 in words is "twenty-six billion, six hundred fifty-three million, three hundred sixty-one thousand, six hundred forty-one".