6698919953281 has 2 divisors, whose sum is σ = 6698919953282. Its totient is φ = 6698919953280.

The previous prime is 6698919953189. The next prime is 6698919953291. The reversal of 6698919953281 is 1823599198966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6028944962881 + 669974990400 = 2455391^2 + 818520^2 .

It is a cyclic number.

It is not a de Polignac number, because 6698919953281 - 2⁷ = 6698919953153 is a prime.

It is a super-2 number, since 2×6698919953281² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6698919953198 and 6698919953207.

It is not a weakly prime, because it can be changed into another prime (6698919953291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3349459976640 + 3349459976641.

It is an arithmetic number, because the mean of its divisors is an integer number (3349459976641).

Almost surely, 2^{6698919953281} is an apocalyptic number.

It is an amenable number.

6698919953281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6698919953281 is an equidigital number, since it uses as much as digits as its factorization.

6698919953281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453496320, while the sum is 76.

The spelling of 6698919953281 in words is "six trillion, six hundred ninety-eight billion, nine hundred nineteen million, nine hundred fifty-three thousand, two hundred eighty-one".