2821311668 has 24 divisors (see below), whose sum is σ = 5653737600. Its totient is φ = 1206751968.

The previous prime is 2821311641. The next prime is 2821311673. The reversal of 2821311668 is 8661131282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84728 + ... + 113231.

It is an arithmetic number, because the mean of its divisors is an integer number (235572400).

Almost surely, 2^2821311668 is an apocalyptic number.

2821311668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2821311668 is an abundant number, since it is smaller than the sum of its proper divisors (2832425932).

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

2821311668 is a wasteful number, since it uses less digits than its factorization.

2821311668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198479 (or 198477 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 2821311668 is about 53116.0208223470. The cubic root of 2821311668 is about 1413.0266570615.

The spelling of 2821311668 in words is "two billion, eight hundred twenty-one million, three hundred eleven thousand, six hundred sixty-eight".