165501210016 has 12 divisors (see below), whose sum is σ = 325830507282. Its totient is φ = 82750604992.

The previous prime is 165501210013. The next prime is 165501210029. The reversal of 165501210016 is 610012105561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 148844726416 + 16656483600 = 385804^2 + 129060^2 .

It is not an unprimeable number, because it can be changed into a prime (165501210013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2585956375 + ... + 2585956438.

Almost surely, 2^165501210016 is an apocalyptic number.

165501210016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165501210016 is a deficient number, since it is larger than the sum of its proper divisors (160329297266).

165501210016 is an equidigital number, since it uses as much as digits as its factorization.

165501210016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171912823 (or 5171912815 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 165501210016 its reverse (610012105561), we get a palindrome (775513315577).

The spelling of 165501210016 in words is "one hundred sixty-five billion, five hundred one million, two hundred ten thousand, sixteen".