26799641324569 has 9 divisors (see below), whose sum is σ = 27261882069013. Its totient is φ = 26345109859132.

The previous prime is 26799641324563. The next prime is 26799641324609. The reversal of 26799641324569 is 96542314699762.

The square root of 26799641324569 is 5176837.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-26799641324569 is a prime.

It is a super-2 number, since 2×26799641324569² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26799641324563) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 305389512 + ... + 305477254.

Almost surely, 2^{26799641324569} is an apocalyptic number.

26799641324569 is the 5176837-th square number.

26799641324569 is the 2588419-th centered octagonal number.

It is an amenable number.

26799641324569 is a deficient number, since it is larger than the sum of its proper divisors (462240744444).

26799641324569 is an frugal number, since it uses more digits than its factorization.

26799641324569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175604 (or 87802 counting only the distinct ones).

The product of its digits is 1058158080, while the sum is 73.

The spelling of 26799641324569 in words is "twenty-six trillion, seven hundred ninety-nine billion, six hundred forty-one million, three hundred twenty-four thousand, five hundred sixty-nine".