165261012 has 96 divisors (see below), whose sum is σ = 491258880. Its totient is φ = 42094080.

The previous prime is 165260999. The next prime is 165261059. The reversal of 165261012 is 210162561.

It is a super-3 number, since 3×165261012³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24087 + ... + 30177.

It is an arithmetic number, because the mean of its divisors is an integer number (5117280).

Almost surely, 2^165261012 is an apocalyptic number.

165261012 is a gapful number since it is divisible by the number (12) 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 165261012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245629440).

165261012 is an abundant number, since it is smaller than the sum of its proper divisors (325997868).

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

165261012 is a wasteful number, since it uses less digits than its factorization.

165261012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141 (or 6139 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 165261012 is about 12855.3884422059. The cubic root of 165261012 is about 548.7697150639.

The spelling of 165261012 in words is "one hundred sixty-five million, two hundred sixty-one thousand, twelve".