165135750 has 64 divisors (see below), whose sum is σ = 443911104. Its totient is φ = 40646400.

The previous prime is 165135743. The next prime is 165135787. The reversal of 165135750 is 57531561.

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, 1282 + ... + 18218.

It is an arithmetic number, because the mean of its divisors is an integer number (6936111).

Almost surely, 2^165135750 is an apocalyptic number.

165135750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165135750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221955552).

165135750 is an abundant number, since it is smaller than the sum of its proper divisors (278775354).

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

165135750 is a wasteful number, since it uses less digits than its factorization.

165135750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16970 (or 16960 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 165135750 is about 12850.5155538601. The cubic root of 165135750 is about 548.6310306760.

It can be divided in two parts, 1651 and 35750, that added together give a triangular number (37401 = T₂₇₃).

The spelling of 165135750 in words is "one hundred sixty-five million, one hundred thirty-five thousand, seven hundred fifty".