165063540 has 96 divisors (see below), whose sum is σ = 501427584. Its totient is φ = 40407040.

The previous prime is 165063539. The next prime is 165063553. The reversal of 165063540 is 45360561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 165063498 and 165063507.

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, 39847 + ... + 43793.

It is an arithmetic number, because the mean of its divisors is an integer number (5223204).

Almost surely, 2^165063540 is an apocalyptic number.

165063540 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 165063540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250713792).

165063540 is an abundant number, since it is smaller than the sum of its proper divisors (336364044).

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

165063540 is a wasteful number, since it uses less digits than its factorization.

165063540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 165063540 is about 12847.7056317461. The cubic root of 165063540 is about 548.5510511791.

The spelling of 165063540 in words is "one hundred sixty-five million, sixty-three thousand, five hundred forty".