9779455656 has 48 divisors (see below), whose sum is σ = 26679381300. Its totient is φ = 3236020992.

The previous prime is 9779455633. The next prime is 9779455663. The reversal of 9779455656 is 6565549779.

9779455656 is a `hidden beast` number, since 9 + 7 + 79 + 4 + 556 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9260982756 + 518472900 = 96234^2 + 22770^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9779455593 and 9779455602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 485851 + ... + 505578.

Almost surely, 2^9779455656 is an apocalyptic number.

It is an amenable number.

9779455656 is an abundant number, since it is smaller than the sum of its proper divisors (16899925644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9779455656 is a wasteful number, since it uses less digits than its factorization.

9779455656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991578 (or 991571 counting only the distinct ones).

The product of its digits is 71442000, while the sum is 63.

The square root of 9779455656 is about 98891.1303201657. The cubic root of 9779455656 is about 2138.4785278196.

The spelling of 9779455656 in words is "nine billion, seven hundred seventy-nine million, four hundred fifty-five thousand, six hundred fifty-six".