1669858036868 has 24 divisors (see below), whose sum is σ = 3339931593600. Its totient is φ = 715607261568.

The previous prime is 1669858036849. The next prime is 1669858036871. The reversal of 1669858036868 is 8686308589661.

It is a junction number, because it is equal to n+sod(n) for n = 1669858036795 and 1669858036804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480853 + ... + 2352156.

It is an arithmetic number, because the mean of its divisors is an integer number (139163816400).

Almost surely, 2^{1669858036868} is an apocalyptic number.

It is an amenable number.

1669858036868 is an abundant number, since it is smaller than the sum of its proper divisors (1670073556732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1669858036868 is a wasteful number, since it uses less digits than its factorization.

1669858036868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848579 (or 3848577 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 74.

The spelling of 1669858036868 in words is "one trillion, six hundred sixty-nine billion, eight hundred fifty-eight million, thirty-six thousand, eight hundred sixty-eight".