1980384065947 has 16 divisors (see below), whose sum is σ = 2383846352640. Its totient is φ = 1607166556128.

The previous prime is 1980384065917. The next prime is 1980384065963. The reversal of 1980384065947 is 7495604830891.

It is a de Polignac number, because none of the positive numbers 2^k-1980384065947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980384065917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4244428 + ... + 4687849.

It is an arithmetic number, because the mean of its divisors is an integer number (148990397040).

Almost surely, 2^{1980384065947} is an apocalyptic number.

1980384065947 is a deficient number, since it is larger than the sum of its proper divisors (403462286693).

1980384065947 is a wasteful number, since it uses less digits than its factorization.

1980384065947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8933970.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 1980384065947 in words is "one trillion, nine hundred eighty billion, three hundred eighty-four million, sixty-five thousand, nine hundred forty-seven".