26564308969 has 12 divisors (see below), whose sum is σ = 29020314960. Its totient is φ = 24115192200.

The previous prime is 26564308957. The next prime is 26564308999. The reversal of 26564308969 is 96980346562.

It is a de Polignac number, because none of the positive numbers 2^k-26564308969 is a prime.

It is a super-2 number, since 2×26564308969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26564308999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10801662 + ... + 10804120.

It is an arithmetic number, because the mean of its divisors is an integer number (2418359580).

Almost surely, 2^26564308969 is an apocalyptic number.

It is an amenable number.

26564308969 is a deficient number, since it is larger than the sum of its proper divisors (2456005991).

26564308969 is an frugal number, since it uses more digits than its factorization.

26564308969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452 (or 3461 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 58.

It can be divided in two parts, 26564 and 308969, that added together give a palindrome (335533).

The spelling of 26564308969 in words is "twenty-six billion, five hundred sixty-four million, three hundred eight thousand, nine hundred sixty-nine".