16562343643 has 4 divisors (see below), whose sum is σ = 17434045960. Its totient is φ = 15690641328.

The previous prime is 16562343617. The next prime is 16562343709. The reversal of 16562343643 is 34634326561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34634326561 = 97 ⋅357054913.

It is a cyclic number.

It is not a de Polignac number, because 16562343643 - 2²⁹ = 16025472731 is a prime.

It is a super-2 number, since 2×16562343643² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16562343643.

It is not an unprimeable number, because it can be changed into a prime (16562343043) 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, 435851130 + ... + 435851167.

It is an arithmetic number, because the mean of its divisors is an integer number (4358511490).

Almost surely, 2^16562343643 is an apocalyptic number.

16562343643 is a deficient number, since it is larger than the sum of its proper divisors (871702317).

16562343643 is an equidigital number, since it uses as much as digits as its factorization.

16562343643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871702316.

The product of its digits is 933120, while the sum is 43.

The spelling of 16562343643 in words is "sixteen billion, five hundred sixty-two million, three hundred forty-three thousand, six hundred forty-three".