2145216665732 has 12 divisors (see below), whose sum is σ = 4290433331520. Its totient is φ = 919378571016.

The previous prime is 2145216665723. The next prime is 2145216665737. The reversal of 2145216665732 is 2375666125412.

2145216665732 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2145216665737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38307440432 + ... + 38307440487.

It is an arithmetic number, because the mean of its divisors is an integer number (357536110960).

Almost surely, 2^{2145216665732} is an apocalyptic number.

It is an amenable number.

2145216665732 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.

2145216665732 is a wasteful number, since it uses less digits than its factorization.

2145216665732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76614880930 (or 76614880928 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 2145216665732 in words is "two trillion, one hundred forty-five billion, two hundred sixteen million, six hundred sixty-five thousand, seven hundred thirty-two".