26397584641 has 4 divisors (see below), whose sum is σ = 26477335984. Its totient is φ = 26317833300.

The previous prime is 26397584617. The next prime is 26397584671. The reversal of 26397584641 is 14648579362.

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 26397584641 - 2²⁹ = 25860713729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26397584611) 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, 39875175 + ... + 39875836.

It is an arithmetic number, because the mean of its divisors is an integer number (6619333996).

Almost surely, 2^26397584641 is an apocalyptic number.

It is an amenable number.

26397584641 is a deficient number, since it is larger than the sum of its proper divisors (79751343).

26397584641 is an equidigital number, since it uses as much as digits as its factorization.

26397584641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79751342.

The product of its digits is 8709120, while the sum is 55.

The spelling of 26397584641 in words is "twenty-six billion, three hundred ninety-seven million, five hundred eighty-four thousand, six hundred forty-one".