1664305237252 has 12 divisors (see below), whose sum is σ = 3328610474560. Its totient is φ = 713273673096.

The previous prime is 1664305237213. The next prime is 1664305237267. The reversal of 1664305237252 is 2527325034661.

1664305237252 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29719736352 + ... + 29719736407.

Almost surely, 2^{1664305237252} is an apocalyptic number.

It is an amenable number.

1664305237252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1664305237252 is a wasteful number, since it uses less digits than its factorization.

1664305237252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59439472770 (or 59439472768 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 1664305237252 in words is "one trillion, six hundred sixty-four billion, three hundred five million, two hundred thirty-seven thousand, two hundred fifty-two".