26870362681 has 2 divisors, whose sum is σ = 26870362682. Its totient is φ = 26870362680.

The previous prime is 26870362591. The next prime is 26870362709. The reversal of 26870362681 is 18626307862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26484633081 + 385729600 = 162741^2 + 19640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26870362681 is a prime.

It is a super-2 number, since 2×26870362681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26870365681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13435181340 + 13435181341.

It is an arithmetic number, because the mean of its divisors is an integer number (13435181341).

Almost surely, 2^26870362681 is an apocalyptic number.

It is an amenable number.

26870362681 is a deficient number, since it is larger than the sum of its proper divisors (1).

26870362681 is an equidigital number, since it uses as much as digits as its factorization.

26870362681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 26870362681 in words is "twenty-six billion, eight hundred seventy million, three hundred sixty-two thousand, six hundred eighty-one".