165378862224 has 45 divisors (see below), whose sum is σ = 462844779033. Its totient is φ = 55124660736.

The previous prime is 165378862213. The next prime is 165378862249. The reversal of 165378862224 is 422268873561.

The square root of 165378862224 is 406668.

It is a perfect power (a square), and thus also a powerful number.

165378862224 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 7 + 8 + 8 + 622 + 2 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 157662996624 + 7715865600 = 397068^2 + 87840^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4863072 + ... + 4896960.

Almost surely, 2^165378862224 is an apocalyptic number.

165378862224 is the 406668-th square number.

It is an amenable number.

165378862224 is an abundant number, since it is smaller than the sum of its proper divisors (297465916809).

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

165378862224 is an frugal number, since it uses more digits than its factorization.

165378862224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67792 (or 33894 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 165378862224 in words is "one hundred sixty-five billion, three hundred seventy-eight million, eight hundred sixty-two thousand, two hundred twenty-four".