16065156649 has 4 divisors (see below), whose sum is σ = 16456989780. Its totient is φ = 15673323520.

The previous prime is 16065156643. The next prime is 16065156661. The reversal of 16065156649 is 94665156061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94665156061 = 7 ⋅13523593723.

It can be written as a sum of positive squares in 2 ways, for example, as 1589457424 + 14475699225 = 39868^2 + 120315^2 .

It is a cyclic number.

It is not a de Polignac number, because 16065156649 - 2⁹ = 16065156137 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16065156643) 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, 195916504 + ... + 195916585.

It is an arithmetic number, because the mean of its divisors is an integer number (4114247445).

Almost surely, 2^16065156649 is an apocalyptic number.

It is an amenable number.

16065156649 is a deficient number, since it is larger than the sum of its proper divisors (391833131).

16065156649 is an equidigital number, since it uses as much as digits as its factorization.

16065156649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391833130.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 16065156649 in words is "sixteen billion, sixty-five million, one hundred fifty-six thousand, six hundred forty-nine".