165448816516 has 27 divisors (see below), whose sum is σ = 299906448751. Its totient is φ = 79860453344.

The previous prime is 165448816501. The next prime is 165448816517. The reversal of 165448816516 is 615618844561.

The square root of 165448816516 is 406754.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 25201562500 + 140247254016 = 158750^2 + 374496^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165448816517) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23588226 + ... + 23595238.

Almost surely, 2^165448816516 is an apocalyptic number.

165448816516 is the 406754-th square number.

It is an amenable number.

165448816516 is a deficient number, since it is larger than the sum of its proper divisors (134457632235).

165448816516 is an frugal number, since it uses more digits than its factorization.

165448816516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14088 (or 7044 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 55.

The spelling of 165448816516 in words is "one hundred sixty-five billion, four hundred forty-eight million, eight hundred sixteen thousand, five hundred sixteen".