268673916997 has 2 divisors, whose sum is σ = 268673916998. Its totient is φ = 268673916996.

The previous prime is 268673916991. The next prime is 268673917007. The reversal of 268673916997 is 799619376862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258683114881 + 9990802116 = 508609^2 + 99954^2 .

It is a cyclic number.

It is not a de Polignac number, because 268673916997 - 2²⁷ = 268539699269 is a prime.

It is a super-4 number, since 4×268673916997⁴ (a number of 47 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268673916991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134336958498 + 134336958499.

It is an arithmetic number, because the mean of its divisors is an integer number (134336958499).

Almost surely, 2^268673916997 is an apocalyptic number.

It is an amenable number.

268673916997 is a deficient number, since it is larger than the sum of its proper divisors (1).

268673916997 is an equidigital number, since it uses as much as digits as its factorization.

268673916997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370355328, while the sum is 73.

The spelling of 268673916997 in words is "two hundred sixty-eight billion, six hundred seventy-three million, nine hundred sixteen thousand, nine hundred ninety-seven".