1664272280000 has 140 divisors (see below), whose sum is σ = 4502024134872. Its totient is φ = 605189760000.

The previous prime is 1664272279963. The next prime is 1664272280009. The reversal of 1664272280000 is 822724661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664272280009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1451219 + ... + 2331218.

Almost surely, 2^{1664272280000} is an apocalyptic number.

1664272280000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664272280000 is an abundant number, since it is smaller than the sum of its proper divisors (2837751854872).

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

1664272280000 is an equidigital number, since it uses as much as digits as its factorization.

1664272280000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782480 (or 3782455 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 1664272280000 in words is "one trillion, six hundred sixty-four billion, two hundred seventy-two million, two hundred eighty thousand".