1980944764947 has 24 divisors (see below), whose sum is σ = 2892192869280. Its totient is φ = 1306439850240.

The previous prime is 1980944764921. The next prime is 1980944764949. The reversal of 1980944764947 is 7494674490891.

1980944764947 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 94 + 47 + 6 + 494 + 7 = 666.

It is not a de Polignac number, because 1980944764947 - 2²⁶ = 1980877656083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1980944764949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 981078 + ... + 2219099.

It is an arithmetic number, because the mean of its divisors is an integer number (120508036220).

Almost surely, 2^{1980944764947} is an apocalyptic number.

1980944764947 is a deficient number, since it is larger than the sum of its proper divisors (911248104333).

1980944764947 is a wasteful number, since it uses less digits than its factorization.

1980944764947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200923 (or 3200920 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 72.

The spelling of 1980944764947 in words is "one trillion, nine hundred eighty billion, nine hundred forty-four million, seven hundred sixty-four thousand, nine hundred forty-seven".