320165642 has 4 divisors (see below), whose sum is σ = 480248466. Its totient is φ = 160082820.

The previous prime is 320165639. The next prime is 320165647. The reversal of 320165642 is 246561023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246561023 = 1453 ⋅169691.

It can be written as a sum of positive squares in only one way, i.e., 249924481 + 70241161 = 15809^2 + 8381^2 .

It is not an unprimeable number, because it can be changed into a prime (320165647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80041409 + ... + 80041412.

Almost surely, 2^320165642 is an apocalyptic number.

320165642 is a deficient number, since it is larger than the sum of its proper divisors (160082824).

320165642 is a wasteful number, since it uses less digits than its factorization.

320165642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160082823.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 320165642 is about 17893.1730556657. The cubic root of 320165642 is about 684.1083765781.

The spelling of 320165642 in words is "three hundred twenty million, one hundred sixty-five thousand, six hundred forty-two".