6389489745 has 24 divisors (see below), whose sum is σ = 11077702272. Its totient is φ = 3406932000.

The previous prime is 6389489731. The next prime is 6389489747. The reversal of 6389489745 is 5479849836.

6389489745 is a `hidden beast` number, since 6 + 3 + 89 + 489 + 74 + 5 = 666.

It is not a de Polignac number, because 6389489745 - 2¹⁴ = 6389473361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6389489747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213240 + ... + 241350.

It is an arithmetic number, because the mean of its divisors is an integer number (461570928).

Almost surely, 2^6389489745 is an apocalyptic number.

It is an amenable number.

6389489745 is a deficient number, since it is larger than the sum of its proper divisors (4688212527).

6389489745 is a wasteful number, since it uses less digits than its factorization.

6389489745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33173 (or 33170 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 6389489745 is about 79934.2839149761. The cubic root of 6389489745 is about 1855.6186373702.

The spelling of 6389489745 in words is "six billion, three hundred eighty-nine million, four hundred eighty-nine thousand, seven hundred forty-five".