1868333686601 has 2 divisors, whose sum is σ = 1868333686602. Its totient is φ = 1868333686600.

The previous prime is 1868333686577. The next prime is 1868333686717. The reversal of 1868333686601 is 1066863338681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961382211001 + 906951475600 = 980501^2 + 952340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868333686601 is a prime.

It is a super-3 number, since 3×1868333686601³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1868333686501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934166843300 + 934166843301.

It is an arithmetic number, because the mean of its divisors is an integer number (934166843301).

Almost surely, 2^{1868333686601} is an apocalyptic number.

It is an amenable number.

1868333686601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868333686601 is an equidigital number, since it uses as much as digits as its factorization.

1868333686601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 59.

The spelling of 1868333686601 in words is "one trillion, eight hundred sixty-eight billion, three hundred thirty-three million, six hundred eighty-six thousand, six hundred one".