26404666868 has 12 divisors (see below), whose sum is σ = 46339070820. Its totient is φ = 13164932352.

The previous prime is 26404666859. The next prime is 26404666889. The reversal of 26404666868 is 86866640462.

It can be written as a sum of positive squares in 2 ways, for example, as 8284276324 + 18120390544 = 91018^2 + 134612^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9348683 + ... + 9351506.

It is an arithmetic number, because the mean of its divisors is an integer number (3861589235).

Almost surely, 2^26404666868 is an apocalyptic number.

It is an amenable number.

26404666868 is a deficient number, since it is larger than the sum of its proper divisors (19934403952).

26404666868 is a wasteful number, since it uses less digits than its factorization.

26404666868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18700546 (or 18700544 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 56.

The spelling of 26404666868 in words is "twenty-six billion, four hundred four million, six hundred sixty-six thousand, eight hundred sixty-eight".