1600721003161 has 16 divisors (see below), whose sum is σ = 1856984659200. Its totient is φ = 1351471891968.

The previous prime is 1600721003117. The next prime is 1600721003179. The reversal of 1600721003161 is 1613001270061.

It is a cyclic number.

It is not a de Polignac number, because 1600721003161 - 2³¹ = 1598573519513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1600731003161) 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, 4720896 + ... + 5048593.

It is an arithmetic number, because the mean of its divisors is an integer number (116061541200).

Almost surely, 2^{1600721003161} is an apocalyptic number.

It is an amenable number.

1600721003161 is a deficient number, since it is larger than the sum of its proper divisors (256263656039).

1600721003161 is an equidigital number, since it uses as much as digits as its factorization.

1600721003161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9769848.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 1600721003161 in words is "one trillion, six hundred billion, seven hundred twenty-one million, three thousand, one hundred sixty-one".