6515656161 has 16 divisors (see below), whose sum is σ = 10030978944. Its totient is φ = 3684847104.

The previous prime is 6515656093. The next prime is 6515656211. The reversal of 6515656161 is 1616565156.

It is not a de Polignac number, because 6515656161 - 2⁷ = 6515656033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6515656561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597290 + ... + 1601363.

It is an arithmetic number, because the mean of its divisors is an integer number (626936184).

Almost surely, 2^6515656161 is an apocalyptic number.

It is an amenable number.

6515656161 is a deficient number, since it is larger than the sum of its proper divisors (3515322783).

6515656161 is a wasteful number, since it uses less digits than its factorization.

6515656161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198760.

The product of its digits is 162000, while the sum is 42.

The square root of 6515656161 is about 80719.6144750457. The cubic root of 6515656161 is about 1867.7527563714.

The spelling of 6515656161 in words is "six billion, five hundred fifteen million, six hundred fifty-six thousand, one hundred sixty-one".