26351338689 has 56 divisors (see below), whose sum is σ = 42802448360. Its totient is φ = 16215222816.

The previous prime is 26351338687. The next prime is 26351338711. The reversal of 26351338689 is 98683315362.

It is a happy number.

26351338689 is a `hidden beast` number, since 2 + 63 + 513 + 3 + 8 + 68 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2832049089 + 23519289600 = 53217^2 + 153360^2 .

It is not a de Polignac number, because 26351338689 - 2¹ = 26351338687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26351338687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1593387 + ... + 1609839.

It is an arithmetic number, because the mean of its divisors is an integer number (764329435).

Almost surely, 2^26351338689 is an apocalyptic number.

It is an amenable number.

26351338689 is a deficient number, since it is larger than the sum of its proper divisors (16451109671).

26351338689 is an frugal number, since it uses more digits than its factorization.

26351338689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16510 (or 16469 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 26351338689 in words is "twenty-six billion, three hundred fifty-one million, three hundred thirty-eight thousand, six hundred eighty-nine".