165501511012 has 12 divisors (see below), whose sum is σ = 289633901116. Its totient is φ = 82748967840.

The previous prime is 165501510997. The next prime is 165501511037. The reversal of 165501511012 is 210115105561.

It can be written as a sum of positive squares in 2 ways, for example, as 73276324416 + 92225186596 = 270696^2 + 303686^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226539 + ... + 618322.

Almost surely, 2^165501511012 is an apocalyptic number.

It is an amenable number.

165501511012 is a deficient number, since it is larger than the sum of its proper divisors (124132390104).

165501511012 is a wasteful number, since it uses less digits than its factorization.

165501511012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893838 (or 893836 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 28.

Adding to 165501511012 its reverse (210115105561), we get a palindrome (375616616573).

The spelling of 165501511012 in words is "one hundred sixty-five billion, five hundred one million, five hundred eleven thousand, twelve".