16042616221 has 4 divisors (see below), whose sum is σ = 16056411552. Its totient is φ = 16028820892.

The previous prime is 16042616207. The next prime is 16042616231. The reversal of 16042616221 is 12261624061.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-16042616221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16042616231) 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, 6895921 + ... + 6898246.

It is an arithmetic number, because the mean of its divisors is an integer number (4014102888).

Almost surely, 2^16042616221 is an apocalyptic number.

It is an amenable number.

16042616221 is a deficient number, since it is larger than the sum of its proper divisors (13795331).

16042616221 is a wasteful number, since it uses less digits than its factorization.

16042616221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13795330.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 16042616221 in words is "sixteen billion, forty-two million, six hundred sixteen thousand, two hundred twenty-one".