26601223601 has 4 divisors (see below), whose sum is σ = 27219856752. Its totient is φ = 25982590452.

The previous prime is 26601223511. The next prime is 26601223651. The reversal of 26601223601 is 10632210662.

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 26601223601 - 2¹⁰ = 26601222577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26601223651) 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, 309316511 + ... + 309316596.

It is an arithmetic number, because the mean of its divisors is an integer number (6804964188).

Almost surely, 2^26601223601 is an apocalyptic number.

It is an amenable number.

26601223601 is a deficient number, since it is larger than the sum of its proper divisors (618633151).

26601223601 is an equidigital number, since it uses as much as digits as its factorization.

26601223601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618633150.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 26601223601 in words is "twenty-six billion, six hundred one million, two hundred twenty-three thousand, six hundred one".