1668500018500 has 48 divisors (see below), whose sum is σ = 4164576054912. Its totient is φ = 572057148000.

The previous prime is 1668500018461. The next prime is 1668500018509. The reversal of 1668500018500 is 58100058661.

It is not an unprimeable number, because it can be changed into a prime (1668500018509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238353646 + ... + 238360645.

It is an arithmetic number, because the mean of its divisors is an integer number (86762001144).

Almost surely, 2^{1668500018500} is an apocalyptic number.

1668500018500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668500018500 is an abundant number, since it is smaller than the sum of its proper divisors (2496076036412).

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

1668500018500 is a wasteful number, since it uses less digits than its factorization.

1668500018500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476714317 (or 476714305 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 1668500018500 in words is "one trillion, six hundred sixty-eight billion, five hundred million, eighteen thousand, five hundred".