165578705508672 has 84 divisors (see below), whose sum is σ = 481685067225856. Its totient is φ = 54369127169280.

The previous prime is 165578705508661. The next prime is 165578705508691. The reversal of 165578705508672 is 276805507875561.

165578705508672 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 7 + 8 + 7 + 0 + 550 + 8 + 67 + 2 = 666.

165578705508672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 165578705508672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2145207904 + ... + 2145285087.

Almost surely, 2^{165578705508672} is an apocalyptic number.

165578705508672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165578705508672 is an abundant number, since it is smaller than the sum of its proper divisors (316106361717184).

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

165578705508672 is a wasteful number, since it uses less digits than its factorization.

165578705508672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290493076 (or 4290493063 counting only the distinct ones).

The product of its (nonzero) digits is 987840000, while the sum is 72.

The spelling of 165578705508672 in words is "one hundred sixty-five trillion, five hundred seventy-eight billion, seven hundred five million, five hundred eight thousand, six hundred seventy-two".