1668513012285 has 24 divisors (see below), whose sum is σ = 3105477281376. Its totient is φ = 762748805280.

The previous prime is 1668513012281. The next prime is 1668513012293. The reversal of 1668513012285 is 5822103158661.

It is not a de Polignac number, because 1668513012285 - 2² = 1668513012281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668513012281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1135042131 + ... + 1135043600.

It is an arithmetic number, because the mean of its divisors is an integer number (129394886724).

Almost surely, 2^{1668513012285} is an apocalyptic number.

1668513012285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668513012285 is a deficient number, since it is larger than the sum of its proper divisors (1436964269091).

1668513012285 is a wasteful number, since it uses less digits than its factorization.

1668513012285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270085753 (or 2270085746 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 1668513012285 in words is "one trillion, six hundred sixty-eight billion, five hundred thirteen million, twelve thousand, two hundred eighty-five".