8147747656 has 32 divisors (see below), whose sum is σ = 16114248000. Its totient is φ = 3851499456.

The previous prime is 8147747623. The next prime is 8147747681. The reversal of 8147747656 is 6567477418.

It is a junction number, because it is equal to n+sod(n) for n = 8147747597 and 8147747606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18990 + ... + 129058.

It is an arithmetic number, because the mean of its divisors is an integer number (503570250).

Almost surely, 2^8147747656 is an apocalyptic number.

It is an amenable number.

8147747656 is a deficient number, since it is larger than the sum of its proper divisors (7966500344).

8147747656 is a wasteful number, since it uses less digits than its factorization.

8147747656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110581 (or 110577 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 55.

The square root of 8147747656 is about 90264.8749846805. The cubic root of 8147747656 is about 2012.2372764868.

The spelling of 8147747656 in words is "eight billion, one hundred forty-seven million, seven hundred forty-seven thousand, six hundred fifty-six".