6409971917 has 8 divisors (see below), whose sum is σ = 6748144800. Its totient is φ = 6071879664.

The previous prime is 6409971901. The next prime is 6409971929. The reversal of 6409971917 is 7191799046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6409971917 - 2⁴ = 6409971901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409971937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211259 + ... + 239687.

It is an arithmetic number, because the mean of its divisors is an integer number (843518100).

Almost surely, 2^6409971917 is an apocalyptic number.

It is an amenable number.

6409971917 is a deficient number, since it is larger than the sum of its proper divisors (338172883).

6409971917 is a wasteful number, since it uses less digits than its factorization.

6409971917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40315.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 6409971917 is about 80062.3002230138. The cubic root of 6409971917 is about 1857.5993151125.

The spelling of 6409971917 in words is "six billion, four hundred nine million, nine hundred seventy-one thousand, nine hundred seventeen".