1600720509989 has 8 divisors (see below), whose sum is σ = 1607158863360. Its totient is φ = 1594293443856.

The previous prime is 1600720509901. The next prime is 1600720510007. The reversal of 1600720509989 is 9899050270061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1600720509989 - 2³⁶ = 1532001033253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600720506989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2537549 + ... + 3104930.

It is an arithmetic number, because the mean of its divisors is an integer number (200894857920).

Almost surely, 2^{1600720509989} is an apocalyptic number.

It is an amenable number.

1600720509989 is a deficient number, since it is larger than the sum of its proper divisors (6438353371).

1600720509989 is an equidigital number, since it uses as much as digits as its factorization.

1600720509989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643619.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 1600720509989 in words is "one trillion, six hundred billion, seven hundred twenty million, five hundred nine thousand, nine hundred eighty-nine".