165015380 has 48 divisors (see below), whose sum is σ = 366569280. Its totient is φ = 62224128.

The previous prime is 165015353. The next prime is 165015401. The reversal of 165015380 is 83510561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85304 + ... + 87216.

It is an arithmetic number, because the mean of its divisors is an integer number (7636860).

Almost surely, 2^165015380 is an apocalyptic number.

165015380 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 165015380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183284640).

165015380 is an abundant number, since it is smaller than the sum of its proper divisors (201553900).

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

165015380 is a wasteful number, since it uses less digits than its factorization.

165015380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 165015380 is about 12845.8312304031. The cubic root of 165015380 is about 548.4976963956.

The spelling of 165015380 in words is "one hundred sixty-five million, fifteen thousand, three hundred eighty".