389640933171 has 120 divisors (see below), whose sum is σ = 681657766944. Its totient is φ = 221801690880.

The previous prime is 389640933007. The next prime is 389640933217. The reversal of 389640933171 is 171339046983.

It is a happy number.

389640933171 is a `hidden beast` number, since 38 + 9 + 6 + 409 + 33 + 171 = 666.

It is not a de Polignac number, because 389640933171 - 2¹⁸ = 389640671027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389640933571) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 589471581 + ... + 589472241.

Almost surely, 2^389640933171 is an apocalyptic number.

389640933171 is a deficient number, since it is larger than the sum of its proper divisors (292016833773).

389640933171 is an frugal number, since it uses more digits than its factorization.

389640933171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 389640933171 in words is "three hundred eighty-nine billion, six hundred forty million, nine hundred thirty-three thousand, one hundred seventy-one".