6917645385 has 24 divisors (see below), whose sum is σ = 13703526720. Its totient is φ = 3162352032.

The previous prime is 6917645377. The next prime is 6917645401. The reversal of 6917645385 is 5835467196.

It is not a de Polignac number, because 6917645385 - 2³ = 6917645377 is a prime.

It is a super-2 number, since 2×6917645385² = 95707635345223596450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10980075 + ... + 10980704.

It is an arithmetic number, because the mean of its divisors is an integer number (570980280).

Almost surely, 2^6917645385 is an apocalyptic number.

It is an amenable number.

6917645385 is a deficient number, since it is larger than the sum of its proper divisors (6785881335).

6917645385 is a wasteful number, since it uses less digits than its factorization.

6917645385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21960797 (or 21960794 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 6917645385 is about 83172.3835476656. The cubic root of 6917645385 is about 1905.3997259860.

The spelling of 6917645385 in words is "six billion, nine hundred seventeen million, six hundred forty-five thousand, three hundred eighty-five".