165883132800 has 2304 divisors, whose sum is σ = 808176844800. Its totient is φ = 31352832000.

The previous prime is 165883132799. The next prime is 165883132823. The reversal of 165883132800 is 8231388561.

165883132800 is a `hidden beast` number, since 1 + 6 + 58 + 8 + 313 + 280 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1306166337 + ... + 1306166463.

It is an arithmetic number, because the mean of its divisors is an integer number (350771200).

Almost surely, 2^165883132800 is an apocalyptic number.

165883132800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165883132800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404088422400).

165883132800 is an abundant number, since it is smaller than the sum of its proper divisors (642293712000).

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

165883132800 is a wasteful number, since it uses less digits than its factorization.

165883132800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 165883132800 in words is "one hundred sixty-five billion, eight hundred eighty-three million, one hundred thirty-two thousand, eight hundred".