1609385656320 has 960 divisors, whose sum is σ = 6247350977280. Its totient is φ = 395583160320.

The previous prime is 1609385656303. The next prime is 1609385656363. The reversal of 1609385656320 is 236565839061.

It is a happy number.

1609385656320 is a `hidden beast` number, since 1 + 6 + 0 + 9 + 3 + 8 + 56 + 563 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2329067175 + ... + 2329067865.

It is an arithmetic number, because the mean of its divisors is an integer number (6507657268).

Almost surely, 2^{1609385656320} is an apocalyptic number.

1609385656320 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 1609385656320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3123675488640).

1609385656320 is an abundant number, since it is smaller than the sum of its proper divisors (4637965320960).

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

1609385656320 is an frugal number, since it uses more digits than its factorization.

1609385656320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 1609385656320 in words is "one trillion, six hundred nine billion, three hundred eighty-five million, six hundred fifty-six thousand, three hundred twenty".