1999720001604 has 48 divisors (see below), whose sum is σ = 5119747601472. Its totient is φ = 603689054592.

The previous prime is 1999720001581. The next prime is 1999720001621. The reversal of 1999720001604 is 4061000279991.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 120923034 + ... + 120939569.

It is an arithmetic number, because the mean of its divisors is an integer number (106661408364).

Almost surely, 2^{1999720001604} is an apocalyptic number.

It is an amenable number.

1999720001604 is an abundant number, since it is smaller than the sum of its proper divisors (3120027599868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999720001604 is a wasteful number, since it uses less digits than its factorization.

1999720001604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241862676 (or 241862674 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 1999720001604 in words is "one trillion, nine hundred ninety-nine billion, seven hundred twenty million, one thousand, six hundred four".