1620880800000 has 1728 divisors, whose sum is σ = 6898058496000. Its totient is φ = 334924800000.

The previous prime is 1620880799977. The next prime is 1620880800013. The reversal of 1620880800000 is 80880261.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 9055199911 + ... + 9055200089.

It is an arithmetic number, because the mean of its divisors is an integer number (3991932000).

Almost surely, 2^{1620880800000} is an apocalyptic number.

1620880800000 is a gapful number since it is divisible by the number (10) 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 1620880800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3449029248000).

1620880800000 is an abundant number, since it is smaller than the sum of its proper divisors (5277177696000).

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

1620880800000 is an frugal number, since it uses more digits than its factorization.

1620880800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The spelling of 1620880800000 in words is "one trillion, six hundred twenty billion, eight hundred eighty million, eight hundred thousand".