9645421968 has 240 divisors, whose sum is σ = 33932161536. Its totient is φ = 2489564160.

The previous prime is 9645421939. The next prime is 9645421969. The reversal of 9645421968 is 8691245469.

9645421968 is a `hidden beast` number, since 9 + 6 + 4 + 542 + 1 + 96 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (9645421969) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 608058 + ... + 623718.

Almost surely, 2^9645421968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9645421968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16966080768).

9645421968 is an abundant number, since it is smaller than the sum of its proper divisors (24286739568).

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

9645421968 is a wasteful number, since it uses less digits than its factorization.

9645421968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15742 (or 15733 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 9645421968 is about 98211.1091883194. The cubic root of 9645421968 is about 2128.6638131551.

The spelling of 9645421968 in words is "nine billion, six hundred forty-five million, four hundred twenty-one thousand, nine hundred sixty-eight".