9650638656 has 84 divisors (see below), whose sum is σ = 27722324032. Its totient is φ = 3209842944.

The previous prime is 9650638619. The next prime is 9650638703. The reversal of 9650638656 is 6568360569.

9650638656 is a `hidden beast` number, since 9 + 6 + 506 + 3 + 86 + 56 = 666.

It is a congruent number.

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, 248595 + ... + 284781.

Almost surely, 2^9650638656 is an apocalyptic number.

9650638656 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9650638656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13861162016).

9650638656 is an abundant number, since it is smaller than the sum of its proper divisors (18071685376).

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

9650638656 is a wasteful number, since it uses less digits than its factorization.

9650638656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36668 (or 36655 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The square root of 9650638656 is about 98237.6641416112. The cubic root of 9650638656 is about 2129.0475037685.

The spelling of 9650638656 in words is "nine billion, six hundred fifty million, six hundred thirty-eight thousand, six hundred fifty-six".