165680064288 has 72 divisors (see below), whose sum is σ = 491637601728. Its totient is φ = 52825525632.

The previous prime is 165680064287. The next prime is 165680064289. The reversal of 165680064288 is 882460086561.

165680064288 is a `hidden beast` number, since 16 + 568 + 0 + 0 + 64 + 2 + 8 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (165680064287) and next prime (165680064289).

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (165680064287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12499420 + ... + 12512667.

It is an arithmetic number, because the mean of its divisors is an integer number (6828300024).

Almost surely, 2^165680064288 is an apocalyptic number.

165680064288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

165680064288 is an abundant number, since it is smaller than the sum of its proper divisors (325957537440).

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

165680064288 is a wasteful number, since it uses less digits than its factorization.

165680064288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25012126 (or 25012115 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 165680064288 in words is "one hundred sixty-five billion, six hundred eighty million, sixty-four thousand, two hundred eighty-eight".