165884016550 has 24 divisors (see below), whose sum is σ = 352622024496. Its totient is φ = 56874519840.

The previous prime is 165884016533. The next prime is 165884016553. The reversal of 165884016550 is 55610488561.

It is a happy number.

It is a super-3 number, since 3×165884016550³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165884016494 and 165884016503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165884016553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236976817 + ... + 236977516.

It is an arithmetic number, because the mean of its divisors is an integer number (14692584354).

Almost surely, 2^165884016550 is an apocalyptic number.

165884016550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165884016550 is an abundant number, since it is smaller than the sum of its proper divisors (186738007946).

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

165884016550 is a wasteful number, since it uses less digits than its factorization.

165884016550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473954352 (or 473954347 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 49.

The spelling of 165884016550 in words is "one hundred sixty-five billion, eight hundred eighty-four million, sixteen thousand, five hundred fifty".