6516355217 has 4 divisors (see below), whose sum is σ = 6726560256. Its totient is φ = 6306150180.

The previous prime is 6516355177. The next prime is 6516355229. The reversal of 6516355217 is 7125536156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6516355217 - 2⁸ = 6516354961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6516355277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105102473 + ... + 105102534.

It is an arithmetic number, because the mean of its divisors is an integer number (1681640064).

Almost surely, 2^6516355217 is an apocalyptic number.

It is an amenable number.

6516355217 is a deficient number, since it is larger than the sum of its proper divisors (210205039).

6516355217 is a wasteful number, since it uses less digits than its factorization.

6516355217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210205038.

The product of its digits is 189000, while the sum is 41.

The square root of 6516355217 is about 80723.9445084295. The cubic root of 6516355217 is about 1867.8195502111.

It can be divided in two parts, 65 and 16355217, that multiplied together give a triangular number (1063089105 = T₄₆₁₁₀).

The spelling of 6516355217 in words is "six billion, five hundred sixteen million, three hundred fifty-five thousand, two hundred seventeen".