7847408656 has 10 divisors (see below), whose sum is σ = 15204354302. Its totient is φ = 3923704320.

The previous prime is 7847408629. The next prime is 7847408683. The reversal of 7847408656 is 6568047487.

It is an interprime number because it is at equal distance from previous prime (7847408629) and next prime (7847408683).

It can be written as a sum of positive squares in only one way, i.e., 7218201600 + 629207056 = 84960^2 + 25084^2 .

It is a super-2 number, since 2×7847408656² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7847408597 and 7847408606.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245231505 + ... + 245231536.

Almost surely, 2^7847408656 is an apocalyptic number.

It is an amenable number.

7847408656 is a deficient number, since it is larger than the sum of its proper divisors (7356945646).

7847408656 is a wasteful number, since it uses less digits than its factorization.

7847408656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490463049 (or 490463043 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 55.

The square root of 7847408656 is about 88585.6007260774. The cubic root of 7847408656 is about 1987.2023392735.

The spelling of 7847408656 in words is "seven billion, eight hundred forty-seven million, four hundred eight thousand, six hundred fifty-six".