1972643523824 has 20 divisors (see below), whose sum is σ = 3846340761144. Its totient is φ = 980039456448.

The previous prime is 1972643523811. The next prime is 1972643523827. The reversal of 1972643523824 is 4283253462791.

It is a self number, because there is not a number n which added to its sum of digits gives 1972643523824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972643523827) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 392641502 + ... + 392646525.

Almost surely, 2^{1972643523824} is an apocalyptic number.

It is an amenable number.

1972643523824 is a deficient number, since it is larger than the sum of its proper divisors (1873697237320).

1972643523824 is a wasteful number, since it uses less digits than its factorization.

1972643523824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785288192 (or 785288186 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 56.

The spelling of 1972643523824 in words is "one trillion, nine hundred seventy-two billion, six hundred forty-three million, five hundred twenty-three thousand, eight hundred twenty-four".