201620564613 has 40 divisors (see below), whose sum is σ = 333120851448. Its totient is φ = 120720813696.

The previous prime is 201620564599. The next prime is 201620564633. The reversal of 201620564613 is 316465026102.

201620564613 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 2 + 0 + 5 + 646 + 1 + 3 = 666.

201620564613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2845475649 + 198775088964 = 53343^2 + 445842^2 .

It is not a de Polignac number, because 201620564613 - 2⁵ = 201620564581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201620564633) 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 39 ways as a sum of consecutive naturals, for example, 2548506 + ... + 2626427.

Almost surely, 2^201620564613 is an apocalyptic number.

It is an amenable number.

201620564613 is a deficient number, since it is larger than the sum of its proper divisors (131500286835).

201620564613 is a wasteful number, since it uses less digits than its factorization.

201620564613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174995 (or 5174986 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 201620564613 in words is "two hundred one billion, six hundred twenty million, five hundred sixty-four thousand, six hundred thirteen".