202064020643 has 4 divisors (see below), whose sum is σ = 202832325168. Its totient is φ = 201295716120.

The previous prime is 202064020633. The next prime is 202064020661. The reversal of 202064020643 is 346020460202.

202064020643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346020460202 = 2 ⋅173010230101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202064020643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202064020633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384151868 + ... + 384152393.

It is an arithmetic number, because the mean of its divisors is an integer number (50708081292).

Almost surely, 2^202064020643 is an apocalyptic number.

202064020643 is a deficient number, since it is larger than the sum of its proper divisors (768304525).

202064020643 is an equidigital number, since it uses as much as digits as its factorization.

202064020643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768304524.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 202064020643 its reverse (346020460202), we get a palindrome (548084480845).

The spelling of 202064020643 in words is "two hundred two billion, sixty-four million, twenty thousand, six hundred forty-three".