165541135650 has 192 divisors, whose sum is σ = 471880512000. Its totient is φ = 37983168000.

The previous prime is 165541135589. The next prime is 165541135651. The reversal of 165541135650 is 56531145561.

165541135650 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165541135651) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 47995126 + ... + 47998574.

It is an arithmetic number, because the mean of its divisors is an integer number (2457711000).

Almost surely, 2^165541135650 is an apocalyptic number.

165541135650 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 165541135650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235940256000).

165541135650 is an abundant number, since it is smaller than the sum of its proper divisors (306339376350).

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

165541135650 is a wasteful number, since it uses less digits than its factorization.

165541135650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 165541135650 in words is "one hundred sixty-five billion, five hundred forty-one million, one hundred thirty-five thousand, six hundred fifty".