7686734257 has 8 divisors (see below), whose sum is σ = 7814613672. Its totient is φ = 7558915200.

The previous prime is 7686734249. The next prime is 7686734299. The reversal of 7686734257 is 7524376867.

7686734257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 365536161 + 7321198096 = 19119^2 + 85564^2 .

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 7686734257 - 2³ = 7686734249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7686734198 and 7686734207.

It is not an unprimeable number, because it can be changed into a prime (7686734227) 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, 293733 + ... + 318829.

It is an arithmetic number, because the mean of its divisors is an integer number (976826709).

Almost surely, 2^7686734257 is an apocalyptic number.

It is an amenable number.

7686734257 is a deficient number, since it is larger than the sum of its proper divisors (127879415).

7686734257 is a wasteful number, since it uses less digits than its factorization.

7686734257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30179.

The product of its digits is 11854080, while the sum is 55.

The square root of 7686734257 is about 87674.0227034211. The cubic root of 7686734257 is about 1973.5461613387.

The spelling of 7686734257 in words is "seven billion, six hundred eighty-six million, seven hundred thirty-four thousand, two hundred fifty-seven".