165433809996 has 1008 divisors, whose sum is σ = 597850364160. Its totient is φ = 39739714560.

The previous prime is 165433809943. The next prime is 165433810037. The reversal of 165433809996 is 699908334561.

165433809996 is a `hidden beast` number, since 1 + 6 + 543 + 3 + 80 + 9 + 9 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 5336574501 + ... + 5336574531.

It is an arithmetic number, because the mean of its divisors is an integer number (593105520).

Almost surely, 2^165433809996 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 165433809996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298925182080).

165433809996 is an abundant number, since it is smaller than the sum of its proper divisors (432416554164).

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

165433809996 is a wasteful number, since it uses less digits than its factorization.

165433809996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 165433809996 in words is "one hundred sixty-five billion, four hundred thirty-three million, eight hundred nine thousand, nine hundred ninety-six".