9817639056 has 135 divisors (see below), whose sum is σ = 28802520019. Its totient is φ = 3121542336.

The previous prime is 9817639037. The next prime is 9817639087. The reversal of 9817639056 is 6509367189.

The square root of 9817639056 is 99084.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×9817639056² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9817638993 and 9817639011.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27347005 + ... + 27347363.

Almost surely, 2^9817639056 is an apocalyptic number.

9817639056 is the 99084-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9817639056

9817639056 is an abundant number, since it is smaller than the sum of its proper divisors (18984880963).

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

9817639056 is a wasteful number, since it uses less digits than its factorization.

9817639056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The cubic root of 9817639056 is about 2141.2581078555.

The spelling of 9817639056 in words is "nine billion, eight hundred seventeen million, six hundred thirty-nine thousand, fifty-six".