26974665918749 has 2 divisors, whose sum is σ = 26974665918750. Its totient is φ = 26974665918748.

The previous prime is 26974665918689. The next prime is 26974665918757. The reversal of 26974665918749 is 94781956647962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21490474751524 + 5484191167225 = 4635782^2 + 2341835^2 .

It is a cyclic number.

It is not a de Polignac number, because 26974665918749 - 2³⁶ = 26905946442013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26974665918349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13487332959374 + 13487332959375.

It is an arithmetic number, because the mean of its divisors is an integer number (13487332959375).

Almost surely, 2^{26974665918749} is an apocalyptic number.

It is an amenable number.

26974665918749 is a deficient number, since it is larger than the sum of its proper divisors (1).

26974665918749 is an equidigital number, since it uses as much as digits as its factorization.

26974665918749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9876142080, while the sum is 83.

The spelling of 26974665918749 in words is "twenty-six trillion, nine hundred seventy-four billion, six hundred sixty-five million, nine hundred eighteen thousand, seven hundred forty-nine".