165616531044 has 24 divisors (see below), whose sum is σ = 389983883520. Its totient is φ = 54699037344.

The previous prime is 165616531037. The next prime is 165616531063. The reversal of 165616531044 is 440135616561.

165616531044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165616530987 and 165616531005.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63307764 + ... + 63310379.

It is an arithmetic number, because the mean of its divisors is an integer number (16249328480).

Almost surely, 2^165616531044 is an apocalyptic number.

It is an amenable number.

165616531044 is an abundant number, since it is smaller than the sum of its proper divisors (224367352476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165616531044 is a wasteful number, since it uses less digits than its factorization.

165616531044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126618259 (or 126618257 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 165616531044 in words is "one hundred sixty-five billion, six hundred sixteen million, five hundred thirty-one thousand, forty-four".