16261643 has 4 divisors (see below), whose sum is σ = 16369488. Its totient is φ = 16153800.

The previous prime is 16261633. The next prime is 16261649. The reversal of 16261643 is 34616261.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16261643 - 2⁶ = 16261579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16261649) 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, 53696 + ... + 53997.

It is an arithmetic number, because the mean of its divisors is an integer number (4092372).

Almost surely, 2^16261643 is an apocalyptic number.

16261643 is a deficient number, since it is larger than the sum of its proper divisors (107845).

16261643 is a wasteful number, since it uses less digits than its factorization.

16261643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107844.

The product of its digits is 5184, while the sum is 29.

The square root of 16261643 is about 4032.5727519786. The cubic root of 16261643 is about 253.3503299230.

The spelling of 16261643 in words is "sixteen million, two hundred sixty-one thousand, six hundred forty-three".