1620203430065 has 64 divisors (see below), whose sum is σ = 2162081230848. Its totient is φ = 1155745843200.

The previous prime is 1620203430061. The next prime is 1620203430073. The reversal of 1620203430065 is 5600343020261.

It is not a de Polignac number, because 1620203430065 - 2² = 1620203430061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620203430061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 927419522 + ... + 927421268.

It is an arithmetic number, because the mean of its divisors is an integer number (33782519232).

Almost surely, 2^{1620203430065} is an apocalyptic number.

It is an amenable number.

1620203430065 is a deficient number, since it is larger than the sum of its proper divisors (541877800783).

1620203430065 is a wasteful number, since it uses less digits than its factorization.

1620203430065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 1620203430065 in words is "one trillion, six hundred twenty billion, two hundred three million, four hundred thirty thousand, sixty-five".