1972044981994 has 4 divisors (see below), whose sum is σ = 2958067472994. Its totient is φ = 986022490996.

The previous prime is 1972044981989. The next prime is 1972044982001. The reversal of 1972044981994 is 4991894402791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1348647883969 + 623397098025 = 1161313^2 + 789555^2 .

It is a super-2 number, since 2×1972044981994² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493011245497 + ... + 493011245500.

Almost surely, 2^{1972044981994} is an apocalyptic number.

1972044981994 is a deficient number, since it is larger than the sum of its proper divisors (986022491000).

1972044981994 is an equidigital number, since it uses as much as digits as its factorization.

1972044981994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986022490999.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 1972044981994 in words is "one trillion, nine hundred seventy-two billion, forty-four million, nine hundred eighty-one thousand, nine hundred ninety-four".