16161604219 has 4 divisors (see below), whose sum is σ = 16163009896. Its totient is φ = 16160198544.

The previous prime is 16161604187. The next prime is 16161604241. The reversal of 16161604219 is 91240616161.

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 16161604219 - 2⁵ = 16161604187 is a prime.

It is a super-2 number, since 2×16161604219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16161604289) 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, 685449 + ... + 708634.

It is an arithmetic number, because the mean of its divisors is an integer number (4040752474).

Almost surely, 2^16161604219 is an apocalyptic number.

16161604219 is a deficient number, since it is larger than the sum of its proper divisors (1405677).

16161604219 is a wasteful number, since it uses less digits than its factorization.

16161604219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405676.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 16161604219 in words is "sixteen billion, one hundred sixty-one million, six hundred four thousand, two hundred nineteen".