6512117729 has 12 divisors (see below), whose sum is σ = 7156843056. Its totient is φ = 5921456112.

The previous prime is 6512117701. The next prime is 6512117761. The reversal of 6512117729 is 9277112156.

It is a de Polignac number, because none of the positive numbers 2^k-6512117729 is a prime.

It is a super-2 number, since 2×6512117729² = 84815354632712234882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6512117329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276239 + ... + 298884.

It is an arithmetic number, because the mean of its divisors is an integer number (596403588).

Almost surely, 2^6512117729 is an apocalyptic number.

It is an amenable number.

6512117729 is a deficient number, since it is larger than the sum of its proper divisors (644725327).

6512117729 is a wasteful number, since it uses less digits than its factorization.

6512117729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575216 (or 575203 counting only the distinct ones).

The product of its digits is 52920, while the sum is 41.

The square root of 6512117729 is about 80697.6934552655. The cubic root of 6512117729 is about 1867.4145907450.

The spelling of 6512117729 in words is "six billion, five hundred twelve million, one hundred seventeen thousand, seven hundred twenty-nine".