16181050609 has 4 divisors (see below), whose sum is σ = 16194196480. Its totient is φ = 16167904740.

The previous prime is 16181050607. The next prime is 16181050651. The reversal of 16181050609 is 90605018161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90605018161 = 7 ⋅12943574023.

It is a cyclic number.

It is not a de Polignac number, because 16181050609 - 2¹ = 16181050607 is a prime.

It is a super-2 number, since 2×16181050609² (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 (16181050607) 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, 6571089 + ... + 6573550.

It is an arithmetic number, because the mean of its divisors is an integer number (4048549120).

Almost surely, 2^16181050609 is an apocalyptic number.

It is an amenable number.

16181050609 is a deficient number, since it is larger than the sum of its proper divisors (13145871).

16181050609 is a wasteful number, since it uses less digits than its factorization.

16181050609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13145870.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 16181050609 in words is "sixteen billion, one hundred eighty-one million, fifty thousand, six hundred nine".