16523732653 has 4 divisors (see below), whose sum is σ = 16970320060. Its totient is φ = 16077145248.

The previous prime is 16523732633. The next prime is 16523732671. The reversal of 16523732653 is 35623732561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35623732561 = 133877 ⋅266093.

It can be written as a sum of positive squares in 2 ways, for example, as 11525525449 + 4998207204 = 107357^2 + 70698^2 .

It is a cyclic number.

It is not a de Polignac number, because 16523732653 - 2¹³ = 16523724461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16523732633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223293648 + ... + 223293721.

It is an arithmetic number, because the mean of its divisors is an integer number (4242580015).

Almost surely, 2^16523732653 is an apocalyptic number.

It is an amenable number.

16523732653 is a deficient number, since it is larger than the sum of its proper divisors (446587407).

16523732653 is an equidigital number, since it uses as much as digits as its factorization.

16523732653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446587406.

The product of its digits is 680400, while the sum is 43.

The spelling of 16523732653 in words is "sixteen billion, five hundred twenty-three million, seven hundred thirty-two thousand, six hundred fifty-three".