165601334620 has 24 divisors (see below), whose sum is σ = 348045818400. Its totient is φ = 66186626112.

The previous prime is 165601334539. The next prime is 165601334669. The reversal of 165601334620 is 26433106561.

It is a self number, because there is not a number n which added to its sum of digits gives 165601334620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3344040 + ... + 3393199.

It is an arithmetic number, because the mean of its divisors is an integer number (14501909100).

Almost surely, 2^165601334620 is an apocalyptic number.

165601334620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165601334620 is an abundant number, since it is smaller than the sum of its proper divisors (182444483780).

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

165601334620 is a wasteful number, since it uses less digits than its factorization.

165601334620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738477 (or 6738475 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 165601334620 in words is "one hundred sixty-five billion, six hundred one million, three hundred thirty-four thousand, six hundred twenty".