1328171641772 has 24 divisors (see below), whose sum is σ = 2328167735712. Its totient is φ = 662981312000.

The previous prime is 1328171641649. The next prime is 1328171641789. The reversal of 1328171641772 is 2771461718231.

It is a self number, because there is not a number n which added to its sum of digits gives 1328171641772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12258428 + ... + 12366300.

It is an arithmetic number, because the mean of its divisors is an integer number (97006988988).

Almost surely, 2^{1328171641772} is an apocalyptic number.

It is an amenable number.

1328171641772 is a deficient number, since it is larger than the sum of its proper divisors (999996093940).

1328171641772 is a wasteful number, since it uses less digits than its factorization.

1328171641772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112969 (or 112967 counting only the distinct ones).

The product of its digits is 790272, while the sum is 50.

The spelling of 1328171641772 in words is "one trillion, three hundred twenty-eight billion, one hundred seventy-one million, six hundred forty-one thousand, seven hundred seventy-two".