165616154209636 has 243 divisors, whose sum is σ = 335696043248811. Its totient is φ = 71450588716416.

The previous prime is 165616154209603. The next prime is 165616154209663. The reversal of 165616154209636 is 636902451616561.

The square root of 165616154209636 is 12869194.

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 5792349292900 + 159823804916736 = 2406730^2 + 12642144^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 692954620005 + ... + 692954620243.

Almost surely, 2^{165616154209636} is an apocalyptic number.

165616154209636 is the 12869194-th square number.

It is an amenable number.

165616154209636 is an abundant number, since it is smaller than the sum of its proper divisors (170079889039175).

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

165616154209636 is a wasteful number, since it uses less digits than its factorization.

165616154209636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 61.

The spelling of 165616154209636 in words is "one hundred sixty-five trillion, six hundred sixteen billion, one hundred fifty-four million, two hundred nine thousand, six hundred thirty-six".