16536662231 has 4 divisors (see below), whose sum is σ = 16537353600. Its totient is φ = 16535970864.

The previous prime is 16536662221. The next prime is 16536662237. The reversal of 16536662231 is 13226663561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16536662231 is a prime.

It is a super-2 number, since 2×16536662231² (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 (16536662237) 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, 308471 + ... + 358088.

It is an arithmetic number, because the mean of its divisors is an integer number (4134338400).

Almost surely, 2^16536662231 is an apocalyptic number.

16536662231 is a deficient number, since it is larger than the sum of its proper divisors (691369).

16536662231 is an equidigital number, since it uses as much as digits as its factorization.

16536662231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691368.

The product of its digits is 233280, while the sum is 41.

The spelling of 16536662231 in words is "sixteen billion, five hundred thirty-six million, six hundred sixty-two thousand, two hundred thirty-one".