165033722880 has 528 divisors, whose sum is σ = 635761910784. Its totient is φ = 39308820480.

The previous prime is 165033722857. The next prime is 165033722941. The reversal of 165033722880 is 88227330561.

165033722880 is a `hidden beast` number, since 16 + 5 + 0 + 337 + 228 + 80 = 666.

It is a super-2 number, since 2×165033722880² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18565797 + ... + 18574683.

It is an arithmetic number, because the mean of its divisors is an integer number (1204094528).

Almost surely, 2^165033722880 is an apocalyptic number.

165033722880 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 165033722880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317880955392).

165033722880 is an abundant number, since it is smaller than the sum of its proper divisors (470728187904).

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

165033722880 is a wasteful number, since it uses less digits than its factorization.

165033722880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8962 (or 8941 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 165033722880 in words is "one hundred sixty-five billion, thirty-three million, seven hundred twenty-two thousand, eight hundred eighty".