9815832648 has 24 divisors (see below), whose sum is σ = 26584546950. Its totient is φ = 3271944192.

The previous prime is 9815832583. The next prime is 9815832661. The reversal of 9815832648 is 8462385189.

It can be written as a sum of positive squares in only one way, i.e., 8401922244 + 1413910404 = 91662^2 + 37602^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 9815832594 and 9815832603.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68165433 + ... + 68165576.

Almost surely, 2^9815832648 is an apocalyptic number.

It is an amenable number.

9815832648 is an abundant number, since it is smaller than the sum of its proper divisors (16768714302).

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

9815832648 is a wasteful number, since it uses less digits than its factorization.

9815832648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136331021 (or 136331014 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 9815832648 is about 99074.8840423243. The cubic root of 9815832648 is about 2141.1267720354.

The spelling of 9815832648 in words is "nine billion, eight hundred fifteen million, eight hundred thirty-two thousand, six hundred forty-eight".