26686978103 has 2 divisors, whose sum is σ = 26686978104. Its totient is φ = 26686978102.

The previous prime is 26686978099. The next prime is 26686978121. The reversal of 26686978103 is 30187968662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26686978103 - 2² = 26686978099 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26686978133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13343489051 + 13343489052.

It is an arithmetic number, because the mean of its divisors is an integer number (13343489052).

Almost surely, 2^26686978103 is an apocalyptic number.

26686978103 is a deficient number, since it is larger than the sum of its proper divisors (1).

26686978103 is an equidigital number, since it uses as much as digits as its factorization.

26686978103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 26686978103 in words is "twenty-six billion, six hundred eighty-six million, nine hundred seventy-eight thousand, one hundred three".