165171163740 has 192 divisors, whose sum is σ = 510425169408. Its totient is φ = 39905141760.

The previous prime is 165171163739. The next prime is 165171163783. The reversal of 165171163740 is 47361171561.

It is a junction number, because it is equal to n+sod(n) for n = 165171163692 and 165171163701.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 24513652 + ... + 24520388.

It is an arithmetic number, because the mean of its divisors is an integer number (2658464424).

Almost surely, 2^165171163740 is an apocalyptic number.

165171163740 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 165171163740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255212584704).

165171163740 is an abundant number, since it is smaller than the sum of its proper divisors (345254005668).

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

165171163740 is a wasteful number, since it uses less digits than its factorization.

165171163740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089 (or 7065 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 165171163740 in words is "one hundred sixty-five billion, one hundred seventy-one million, one hundred sixty-three thousand, seven hundred forty".