1972393985992 has 32 divisors (see below), whose sum is σ = 3710417268600. Its totient is φ = 982954699264.

The previous prime is 1972393985987. The next prime is 1972393986007. The reversal of 1972393985992 is 2995893932791.

It can be written as a sum of positive squares in 4 ways, for example, as 1724037276676 + 248356709316 = 1313026^2 + 498354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2640678 + ... + 3304234.

Almost surely, 2^{1972393985992} is an apocalyptic number.

It is an amenable number.

1972393985992 is a deficient number, since it is larger than the sum of its proper divisors (1738023282608).

1972393985992 is a wasteful number, since it uses less digits than its factorization.

1972393985992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664785 (or 664781 counting only the distinct ones).

The product of its digits is 595213920, while the sum is 76.

The spelling of 1972393985992 in words is "one trillion, nine hundred seventy-two billion, three hundred ninety-three million, nine hundred eighty-five thousand, nine hundred ninety-two".