165961790130 has 64 divisors (see below), whose sum is σ = 402523688448. Its totient is φ = 43788349440.

The previous prime is 165961790051. The next prime is 165961790167. The reversal of 165961790130 is 31097169561.

It is a happy number.

165961790130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165961790130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17667735 + ... + 17677125.

It is an arithmetic number, because the mean of its divisors is an integer number (6289432632).

Almost surely, 2^165961790130 is an apocalyptic number.

165961790130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165961790130 is an abundant number, since it is smaller than the sum of its proper divisors (236561898318).

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

165961790130 is a wasteful number, since it uses less digits than its factorization.

165961790130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571.

The product of its (nonzero) digits is 306180, while the sum is 48.

The spelling of 165961790130 in words is "one hundred sixty-five billion, nine hundred sixty-one million, seven hundred ninety thousand, one hundred thirty".