1168443501997 has 2 divisors, whose sum is σ = 1168443501998. Its totient is φ = 1168443501996.

The previous prime is 1168443501913. The next prime is 1168443502091. The reversal of 1168443501997 is 7991053448611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163908691716 + 4534810281 = 1078846^2 + 67341^2 .

It is an emirp because it is prime and its reverse (7991053448611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1168443501997 - 2²⁷ = 1168309284269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1168443501397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584221750998 + 584221750999.

It is an arithmetic number, because the mean of its divisors is an integer number (584221750999).

Almost surely, 2^{1168443501997} is an apocalyptic number.

It is an amenable number.

1168443501997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168443501997 is an equidigital number, since it uses as much as digits as its factorization.

1168443501997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 1168443501997 in words is "one trillion, one hundred sixty-eight billion, four hundred forty-three million, five hundred one thousand, nine hundred ninety-seven".