16536143669 has 4 divisors (see below), whose sum is σ = 17406467040. Its totient is φ = 15665820300.

The previous prime is 16536143633. The next prime is 16536143681. The reversal of 16536143669 is 96634163561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16536143669 - 2¹⁶ = 16536078133 is a prime.

It is a super-2 number, since 2×16536143669² (a number of 21 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 (16536143609) 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, 435161657 + ... + 435161694.

It is an arithmetic number, because the mean of its divisors is an integer number (4351616760).

Almost surely, 2^16536143669 is an apocalyptic number.

16536143669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16536143669 is a deficient number, since it is larger than the sum of its proper divisors (870323371).

16536143669 is an equidigital number, since it uses as much as digits as its factorization.

16536143669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870323370.

The product of its digits is 2099520, while the sum is 50.

The spelling of 16536143669 in words is "sixteen billion, five hundred thirty-six million, one hundred forty-three thousand, six hundred sixty-nine".