8432945985 has 16 divisors (see below), whose sum is σ = 13514739264. Its totient is φ = 4490229312.

The previous prime is 8432945947. The next prime is 8432946007. The reversal of 8432945985 is 5895492348.

It is a de Polignac number, because none of the positive numbers 2^k-8432945985 is a prime.

It is a super-2 number, since 2×8432945985² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449367 + ... + 467756.

It is an arithmetic number, because the mean of its divisors is an integer number (844671204).

Almost surely, 2^8432945985 is an apocalyptic number.

It is an amenable number.

8432945985 is a deficient number, since it is larger than the sum of its proper divisors (5081793279).

8432945985 is a wasteful number, since it uses less digits than its factorization.

8432945985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917744.

The product of its digits is 12441600, while the sum is 57.

The square root of 8432945985 is about 91831.0730907572. The cubic root of 8432945985 is about 2035.4468799073.

The spelling of 8432945985 in words is "eight billion, four hundred thirty-two million, nine hundred forty-five thousand, nine hundred eighty-five".