26809931371 has 2 divisors, whose sum is σ = 26809931372. Its totient is φ = 26809931370.

The previous prime is 26809931363. The next prime is 26809931377. The reversal of 26809931371 is 17313990862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26809931371 - 2³ = 26809931363 is a prime.

It is not a weakly prime, because it can be changed into another prime (26809931377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13404965685 + 13404965686.

It is an arithmetic number, because the mean of its divisors is an integer number (13404965686).

Almost surely, 2^26809931371 is an apocalyptic number.

26809931371 is a deficient number, since it is larger than the sum of its proper divisors (1).

26809931371 is an equidigital number, since it uses as much as digits as its factorization.

26809931371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 26809931371 in words is "twenty-six billion, eight hundred nine million, nine hundred thirty-one thousand, three hundred seventy-one".