9556081920 has 1512 divisors, whose sum is σ = 45843567840. Its totient is φ = 1881169920.

The previous prime is 9556081907. The next prime is 9556081957. The reversal of 9556081920 is 291806559.

9556081920 is a `hidden beast` number, since 9 + 5 + 5 + 608 + 19 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1512).

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 polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 502951671 + ... + 502951689.

It is an arithmetic number, because the mean of its divisors is an integer number (30319820).

Almost surely, 2^9556081920 is an apocalyptic number.

9556081920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9556081920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22921783920).

9556081920 is an abundant number, since it is smaller than the sum of its proper divisors (36287485920).

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

9556081920 is a wasteful number, since it uses less digits than its factorization.

9556081920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 9556081920 is about 97755.2142854794. The cubic root of 9556081920 is about 2122.0712165590.

The spelling of 9556081920 in words is "nine billion, five hundred fifty-six million, eighty-one thousand, nine hundred twenty".