2181898968576 has 160 divisors (see below), whose sum is σ = 6024160429056. Its totient is φ = 701030400000.

The previous prime is 2181898968559. The next prime is 2181898968583. The reversal of 2181898968576 is 6758698981812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11860336 + ... + 12042896.

Almost surely, 2^{2181898968576} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2181898968576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3012080214528).

2181898968576 is an abundant number, since it is smaller than the sum of its proper divisors (3842261460480).

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

2181898968576 is a wasteful number, since it uses less digits than its factorization.

2181898968576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182864 (or 182848 counting only the distinct ones).

The product of its digits is 836075520, while the sum is 78.

The spelling of 2181898968576 in words is "two trillion, one hundred eighty-one billion, eight hundred ninety-eight million, nine hundred sixty-eight thousand, five hundred seventy-six".