1868661859833 has 12 divisors (see below), whose sum is σ = 2699611647460. Its totient is φ = 1245574539936.

The previous prime is 1868661859811. The next prime is 1868661859903. The reversal of 1868661859833 is 3389581668681.

It is a happy number.

1868661859833 is a `hidden beast` number, since 18 + 6 + 8 + 6 + 6 + 18 + 598 + 3 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1119696236649 + 748965623184 = 1058157^2 + 865428^2 .

It is not a de Polignac number, because 1868661859833 - 2⁶ = 1868661859769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868661859633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16610266 + ... + 16722387.

Almost surely, 2^{1868661859833} is an apocalyptic number.

It is an amenable number.

1868661859833 is a deficient number, since it is larger than the sum of its proper divisors (830949787627).

1868661859833 is a wasteful number, since it uses less digits than its factorization.

1868661859833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33338888 (or 33338885 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 72.

The spelling of 1868661859833 in words is "one trillion, eight hundred sixty-eight billion, six hundred sixty-one million, eight hundred fifty-nine thousand, eight hundred thirty-three".