165539064 has 64 divisors (see below), whose sum is σ = 439568640. Its totient is φ = 51770880.

The previous prime is 165539057. The next prime is 165539113. The reversal of 165539064 is 460935561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257127 + ... + 257769.

It is an arithmetic number, because the mean of its divisors is an integer number (6868260).

Almost surely, 2^165539064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165539064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219784320).

165539064 is an abundant number, since it is smaller than the sum of its proper divisors (274029576).

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

165539064 is a wasteful number, since it uses less digits than its factorization.

165539064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 165539064 is about 12866.1985061633. The cubic root of 165539064 is about 549.0773113508.

The spelling of 165539064 in words is "one hundred sixty-five million, five hundred thirty-nine thousand, sixty-four".