9521725680 has 60 divisors (see below), whose sum is σ = 31977131160. Its totient is φ = 2539126656.

The previous prime is 9521725663. The next prime is 9521725709. The reversal of 9521725680 is 865271259.

9521725680 is a `hidden beast` number, since 9 + 521 + 72 + 56 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6611590 + ... + 6613029.

It is an arithmetic number, because the mean of its divisors is an integer number (532952186).

Almost surely, 2^9521725680 is an apocalyptic number.

9521725680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9521725680 is an abundant number, since it is smaller than the sum of its proper divisors (22455405480).

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

9521725680 is a wasteful number, since it uses less digits than its factorization.

9521725680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224638 (or 13224629 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 9521725680 is about 97579.3301883140. The cubic root of 9521725680 is about 2119.5250567725.

The spelling of 9521725680 in words is "nine billion, five hundred twenty-one million, seven hundred twenty-five thousand, six hundred eighty".