165331455664384 has 81 divisors (see below), whose sum is σ = 330779789172399. Its totient is φ = 82475118942720.

The previous prime is 165331455664307. The next prime is 165331455664387. The reversal of 165331455664384 is 483466554133561.

The square root of 165331455664384 is 12858128.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165331455664387) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 142159462587 + ... + 142159463749.

Almost surely, 2^{165331455664384} is an apocalyptic number.

165331455664384 is the 12858128-th square number.

It is an amenable number.

165331455664384 is an abundant number, since it is smaller than the sum of its proper divisors (165448333508015).

165331455664384 is an frugal number, since it uses more digits than its factorization.

165331455664384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724 (or 1856 counting only the distinct ones).

The product of its digits is 373248000, while the sum is 64.

165331455664384 divided by its sum of digits (64) gives a square (2583303994756 = 1607266²).

The spelling of 165331455664384 in words is "one hundred sixty-five trillion, three hundred thirty-one billion, four hundred fifty-five million, six hundred sixty-four thousand, three hundred eighty-four".