4042165623 has 4 divisors (see below), whose sum is σ = 5389554168. Its totient is φ = 2694777080.

The previous prime is 4042165607. The next prime is 4042165637. The reversal of 4042165623 is 3265612404.

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 4042165623 - 2⁴ = 4042165607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042165723) 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, 673694268 + ... + 673694273.

It is an arithmetic number, because the mean of its divisors is an integer number (1347388542).

Almost surely, 2^4042165623 is an apocalyptic number.

4042165623 is a deficient number, since it is larger than the sum of its proper divisors (1347388545).

4042165623 is a wasteful number, since it uses less digits than its factorization.

4042165623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347388544.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 4042165623 is about 63578.0278319484. The cubic root of 4042165623 is about 1592.9593794774.

The spelling of 4042165623 in words is "four billion, forty-two million, one hundred sixty-five thousand, six hundred twenty-three".