16165165560506 has 4 divisors (see below), whose sum is σ = 24247748340762. Its totient is φ = 8082582780252.

The previous prime is 16165165560469. The next prime is 16165165560521. The reversal of 16165165560506 is 60506556156161.

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

It can be written as a sum of positive squares in only one way, i.e., 15809442779881 + 355722780625 = 3976109^2 + 596425^2 .

It is a super-2 number, since 2×16165165560506² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4041291390125 + ... + 4041291390128.

Almost surely, 2^{16165165560506} is an apocalyptic number.

16165165560506 is a deficient number, since it is larger than the sum of its proper divisors (8082582780256).

16165165560506 is an equidigital number, since it uses as much as digits as its factorization.

16165165560506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082582780255.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 16165165560506 in words is "sixteen trillion, one hundred sixty-five billion, one hundred sixty-five million, five hundred sixty thousand, five hundred six".