16868567021357 has 2 divisors, whose sum is σ = 16868567021358. Its totient is φ = 16868567021356.

The previous prime is 16868567021353. The next prime is 16868567021437. The reversal of 16868567021357 is 75312076586861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14029901413801 + 2838665607556 = 3745651^2 + 1684834^2 .

It is a cyclic number.

It is not a de Polignac number, because 16868567021357 - 2² = 16868567021353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16868567021293 and 16868567021302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16868567021353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8434283510678 + 8434283510679.

It is an arithmetic number, because the mean of its divisors is an integer number (8434283510679).

Almost surely, 2^{16868567021357} is an apocalyptic number.

It is an amenable number.

16868567021357 is a deficient number, since it is larger than the sum of its proper divisors (1).

16868567021357 is an equidigital number, since it uses as much as digits as its factorization.

16868567021357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101606400, while the sum is 65.

The spelling of 16868567021357 in words is "sixteen trillion, eight hundred sixty-eight billion, five hundred sixty-seven million, twenty-one thousand, three hundred fifty-seven".