6517998345 has 8 divisors (see below), whose sum is σ = 10428797376. Its totient is φ = 3476265776.

The previous prime is 6517998299. The next prime is 6517998397. The reversal of 6517998345 is 5438997156.

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 6517998345 - 2¹⁵ = 6517965577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217266597 + ... + 217266626.

It is an arithmetic number, because the mean of its divisors is an integer number (1303599672).

Almost surely, 2^6517998345 is an apocalyptic number.

It is an amenable number.

6517998345 is a deficient number, since it is larger than the sum of its proper divisors (3910799031).

6517998345 is a wasteful number, since it uses less digits than its factorization.

6517998345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434533231.

The product of its digits is 8164800, while the sum is 57.

The square root of 6517998345 is about 80734.1213180648. The cubic root of 6517998345 is about 1867.9765300245.

The spelling of 6517998345 in words is "six billion, five hundred seventeen million, nine hundred ninety-eight thousand, three hundred forty-five".