26680891838 has 4 divisors (see below), whose sum is σ = 40021337760. Its totient is φ = 13340445918.

The previous prime is 26680891829. The next prime is 26680891933. The reversal of 26680891838 is 83819808662.

26680891838 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6670222958 + ... + 6670222961.

It is an arithmetic number, because the mean of its divisors is an integer number (10005334440).

Almost surely, 2^26680891838 is an apocalyptic number.

26680891838 is a deficient number, since it is larger than the sum of its proper divisors (13340445922).

26680891838 is a wasteful number, since it uses less digits than its factorization.

26680891838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13340445921.

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 26680891838 in words is "twenty-six billion, six hundred eighty million, eight hundred ninety-one thousand, eight hundred thirty-eight".