9451641920 has 112 divisors (see below), whose sum is σ = 25790469120. Its totient is φ = 3231934464.

The previous prime is 9451641911. The next prime is 9451641959. The reversal of 9451641920 is 291461549.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865937 + ... + 876783.

Almost surely, 2^9451641920 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 9451641920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12895234560).

9451641920 is an abundant number, since it is smaller than the sum of its proper divisors (16338827200).

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

9451641920 is a wasteful number, since it uses less digits than its factorization.

9451641920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11260 (or 11250 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 9451641920 is about 97219.5552345309. Note that the first 3 decimals coincide. The cubic root of 9451641920 is about 2114.3120580390.

The spelling of 9451641920 in words is "nine billion, four hundred fifty-one million, six hundred forty-one thousand, nine hundred twenty".