165572640 has 96 divisors (see below), whose sum is σ = 579519360. Its totient is φ = 44151552.

The previous prime is 165572609. The next prime is 165572677. The reversal of 165572640 is 46275561.

It is a happy number.

165572640 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 7 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 165572595 and 165572604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14844 + ... + 23483.

It is an arithmetic number, because the mean of its divisors is an integer number (6036660).

Almost surely, 2^165572640 is an apocalyptic number.

165572640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165572640 is an abundant number, since it is smaller than the sum of its proper divisors (413946720).

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

165572640 is a wasteful number, since it uses less digits than its factorization.

165572640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38351 (or 38337 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 165572640 is about 12867.5032543225. The cubic root of 165572640 is about 549.1144316395.

The spelling of 165572640 in words is "one hundred sixty-five million, five hundred seventy-two thousand, six hundred forty".