616921018000 has 320 divisors, whose sum is σ = 1765287014400. Its totient is φ = 204056064000.

The previous prime is 616921017989. The next prime is 616921018039. The reversal of 616921018000 is 810129616.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 151463964 + ... + 151468036.

It is an arithmetic number, because the mean of its divisors is an integer number (5516521920).

Almost surely, 2^616921018000 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 616921018000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882643507200).

616921018000 is an abundant number, since it is smaller than the sum of its proper divisors (1148365996400).

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

616921018000 is a wasteful number, since it uses less digits than its factorization.

616921018000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483 (or 4467 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 616921018000 in words is "six hundred sixteen billion, nine hundred twenty-one million, eighteen thousand".