201606504023 has 4 divisors (see below), whose sum is σ = 213465710160. Its totient is φ = 189747297888.

The previous prime is 201606504017. The next prime is 201606504041. The reversal of 201606504023 is 320405606102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320405606102 = 2 ⋅160202803051.

It is a cyclic number.

It is not a de Polignac number, because 201606504023 - 2⁸ = 201606503767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201606504223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5929603043 + ... + 5929603076.

It is an arithmetic number, because the mean of its divisors is an integer number (53366427540).

Almost surely, 2^201606504023 is an apocalyptic number.

201606504023 is a deficient number, since it is larger than the sum of its proper divisors (11859206137).

201606504023 is a wasteful number, since it uses less digits than its factorization.

201606504023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11859206136.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 201606504023 in words is "two hundred one billion, six hundred six million, five hundred four thousand, twenty-three".