9551485440 has 640 divisors, whose sum is σ = 40854528000. Its totient is φ = 2066300928.

The previous prime is 9551485439. The next prime is 9551485451. The reversal of 9551485440 is 445841559.

9551485440 is a `hidden beast` number, since 9 + 551 + 4 + 8 + 54 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×9551485440² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9192441 + ... + 9193479.

It is an arithmetic number, because the mean of its divisors is an integer number (63835200).

Almost surely, 2^9551485440 is an apocalyptic number.

9551485440 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 9551485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20427264000).

9551485440 is an abundant number, since it is smaller than the sum of its proper divisors (31303042560).

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

9551485440 is a wasteful number, since it uses less digits than its factorization.

9551485440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 9551485440 is about 97731.7013051548. The cubic root of 9551485440 is about 2121.7309229008.

The spelling of 9551485440 in words is "nine billion, five hundred fifty-one million, four hundred eighty-five thousand, four hundred forty".