1664204307360 has 384 divisors, whose sum is σ = 6141218840064. Its totient is φ = 370872483840.

The previous prime is 1664204307331. The next prime is 1664204307373. The reversal of 1664204307360 is 637034024661.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 294390294 + ... + 294395946.

It is an arithmetic number, because the mean of its divisors is an integer number (15992757396).

Almost surely, 2^{1664204307360} is an apocalyptic number.

1664204307360 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 1664204307360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3070609420032).

1664204307360 is an abundant number, since it is smaller than the sum of its proper divisors (4477014532704).

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

1664204307360 is a wasteful number, since it uses less digits than its factorization.

1664204307360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856 (or 7848 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 1664204307360 in words is "one trillion, six hundred sixty-four billion, two hundred four million, three hundred seven thousand, three hundred sixty".