26278037668 has 12 divisors (see below), whose sum is σ = 47108189772. Its totient is φ = 12818554880.

The previous prime is 26278037663. The next prime is 26278037743. The reversal of 26278037668 is 86673087262.

It can be written as a sum of positive squares in 2 ways, for example, as 14794343424 + 11483694244 = 121632^2 + 107162^2 .

It is not an unprimeable number, because it can be changed into a prime (26278037663) 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, 80115805 + ... + 80116132.

It is an arithmetic number, because the mean of its divisors is an integer number (3925682481).

Almost surely, 2^26278037668 is an apocalyptic number.

It is an amenable number.

26278037668 is a deficient number, since it is larger than the sum of its proper divisors (20830152104).

26278037668 is a wasteful number, since it uses less digits than its factorization.

26278037668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160231982 (or 160231980 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 26278037668 in words is "twenty-six billion, two hundred seventy-eight million, thirty-seven thousand, six hundred sixty-eight".