165663813952 has 112 divisors (see below), whose sum is σ = 409149377280. Its totient is φ = 64800755712.

The previous prime is 165663813947. The next prime is 165663813979. The reversal of 165663813952 is 259318366561.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 165663813893 and 165663813902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358533 + ... + 678139.

It is an arithmetic number, because the mean of its divisors is an integer number (3653119440).

Almost surely, 2^165663813952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165663813952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204574688640).

165663813952 is an abundant number, since it is smaller than the sum of its proper divisors (243485563328).

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

165663813952 is a wasteful number, since it uses less digits than its factorization.

165663813952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319728 (or 319718 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 55.

The spelling of 165663813952 in words is "one hundred sixty-five billion, six hundred sixty-three million, eight hundred thirteen thousand, nine hundred fifty-two".