165919186944 has 616 divisors, whose sum is σ = 580436583600. Its totient is φ = 47405481984.

The previous prime is 165919186921. The next prime is 165919186969. The reversal of 165919186944 is 449681919561.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

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

Its product of digits (16796160) is a multiple of the sum of its prime divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 23702740989 + ... + 23702740995.

Almost surely, 2^165919186944 is an apocalyptic number.

165919186944 is a gapful number since it is divisible by the number (14) 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 165919186944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290218291800).

165919186944 is an abundant number, since it is smaller than the sum of its proper divisors (414517396656).

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

165919186944 is an frugal number, since it uses more digits than its factorization.

165919186944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 12 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 165919186944 in words is "one hundred sixty-five billion, nine hundred nineteen million, one hundred eighty-six thousand, nine hundred forty-four".