26601075551 has 4 divisors (see below), whose sum is σ = 26738905152. Its totient is φ = 26463245952.

The previous prime is 26601075547. The next prime is 26601075559. The reversal of 26601075551 is 15557010662.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26601075551 - 2² = 26601075547 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 (26601075559) 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, 68914511 + ... + 68914896.

It is an arithmetic number, because the mean of its divisors is an integer number (6684726288).

Almost surely, 2^26601075551 is an apocalyptic number.

26601075551 is a deficient number, since it is larger than the sum of its proper divisors (137829601).

26601075551 is a wasteful number, since it uses less digits than its factorization.

26601075551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137829600.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 26601075551 in words is "twenty-six billion, six hundred one million, seventy-five thousand, five hundred fifty-one".