16005330653 has 4 divisors (see below), whose sum is σ = 17236509948. Its totient is φ = 14774151360.

The previous prime is 16005330641. The next prime is 16005330683. The reversal of 16005330653 is 35603350061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 658332964 + 15346997689 = 25658^2 + 123883^2 .

It is a cyclic number.

It is not a de Polignac number, because 16005330653 - 2¹⁰ = 16005329629 is a prime.

It is a super-2 number, since 2×16005330653² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16005330683) 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, 615589628 + ... + 615589653.

It is an arithmetic number, because the mean of its divisors is an integer number (4309127487).

Almost surely, 2^16005330653 is an apocalyptic number.

16005330653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16005330653 is a deficient number, since it is larger than the sum of its proper divisors (1231179295).

16005330653 is a wasteful number, since it uses less digits than its factorization.

16005330653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231179294.

The product of its (nonzero) digits is 24300, while the sum is 32.

The spelling of 16005330653 in words is "sixteen billion, five million, three hundred thirty thousand, six hundred fifty-three".