4021899943680 has 432 divisors, whose sum is σ = 14126357568960. Its totient is φ = 1056276480000.

The previous prime is 4021899943661. The next prime is 4021899943703. The reversal of 4021899943680 is 863499981204.

4021899943680 is a `hidden beast` number, since 4 + 0 + 2 + 189 + 9 + 94 + 368 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1005221680 + ... + 1005225680.

It is an arithmetic number, because the mean of its divisors is an integer number (32699901780).

Almost surely, 2^{4021899943680} is an apocalyptic number.

4021899943680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021899943680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7063178784480).

4021899943680 is an abundant number, since it is smaller than the sum of its proper divisors (10104457625280).

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

4021899943680 is a wasteful number, since it uses less digits than its factorization.

4021899943680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328 (or 5311 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 4021899943680 in words is "four trillion, twenty-one billion, eight hundred ninety-nine million, nine hundred forty-three thousand, six hundred eighty".