26730668249 has 8 divisors (see below), whose sum is σ = 27662047560. Its totient is φ = 25799931136.

The previous prime is 26730668123. The next prime is 26730668257. The reversal of 26730668249 is 94286603762.

It can be written as a sum of positive squares in 4 ways, for example, as 24571849 + 26706096400 = 4957^2 + 163420^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26730668249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26730668249.

It is not an unprimeable number, because it can be changed into a prime (26730668269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75074 + ... + 243099.

It is an arithmetic number, because the mean of its divisors is an integer number (3457755945).

Almost surely, 2^26730668249 is an apocalyptic number.

26730668249 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

26730668249 is a deficient number, since it is larger than the sum of its proper divisors (931379311).

26730668249 is a wasteful number, since it uses less digits than its factorization.

26730668249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321099.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 26730668249 in words is "twenty-six billion, seven hundred thirty million, six hundred sixty-eight thousand, two hundred forty-nine".