16165665055 has 4 divisors (see below), whose sum is σ = 19398798072. Its totient is φ = 12932532040.

The previous prime is 16165665049. The next prime is 16165665059. The reversal of 16165665055 is 55056656161.

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

It is not a de Polignac number, because 16165665055 - 2¹³ = 16165656863 is a prime.

It is a super-2 number, since 2×16165665055² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16165664996 and 16165665014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16165665059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616566501 + ... + 1616566510.

It is an arithmetic number, because the mean of its divisors is an integer number (4849699518).

Almost surely, 2^16165665055 is an apocalyptic number.

16165665055 is a deficient number, since it is larger than the sum of its proper divisors (3233133017).

16165665055 is an equidigital number, since it uses as much as digits as its factorization.

16165665055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233133016.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 16165665055 in words is "sixteen billion, one hundred sixty-five million, six hundred sixty-five thousand, fifty-five".