201653016623 has 4 divisors (see below), whose sum is σ = 202402656360. Its totient is φ = 200903376888.

The previous prime is 201653016571. The next prime is 201653016661. The reversal of 201653016623 is 326610356102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201653016623 - 2³⁰ = 200579274799 is a prime.

It is a super-2 number, since 2×201653016623² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201653016923) 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, 374819465 + ... + 374820002.

It is an arithmetic number, because the mean of its divisors is an integer number (50600664090).

Almost surely, 2^201653016623 is an apocalyptic number.

201653016623 is a deficient number, since it is larger than the sum of its proper divisors (749639737).

201653016623 is an equidigital number, since it uses as much as digits as its factorization.

201653016623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749639736.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 201653016623 in words is "two hundred one billion, six hundred fifty-three million, sixteen thousand, six hundred twenty-three".