26851736647 has 2 divisors, whose sum is σ = 26851736648. Its totient is φ = 26851736646.

The previous prime is 26851736641. The next prime is 26851736669. The reversal of 26851736647 is 74663715862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26851736647 - 2¹¹ = 26851734599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26851736641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13425868323 + 13425868324.

It is an arithmetic number, because the mean of its divisors is an integer number (13425868324).

Almost surely, 2^26851736647 is an apocalyptic number.

26851736647 is a deficient number, since it is larger than the sum of its proper divisors (1).

26851736647 is an equidigital number, since it uses as much as digits as its factorization.

26851736647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 55.

The spelling of 26851736647 in words is "twenty-six billion, eight hundred fifty-one million, seven hundred thirty-six thousand, six hundred forty-seven".