9554891401440 has 720 divisors, whose sum is σ = 42360067211616. Its totient is φ = 1985429698560.

The previous prime is 9554891401427. The next prime is 9554891401441. The reversal of 9554891401440 is 441041984559.

9554891401440 is a `hidden beast` number, since 9 + 5 + 5 + 489 + 14 + 0 + 144 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9554891401441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 10541902 + ... + 11412338.

Almost surely, 2^{9554891401440} is an apocalyptic number.

9554891401440 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 9554891401440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21180033605808).

9554891401440 is an abundant number, since it is smaller than the sum of its proper divisors (32805175810176).

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

9554891401440 is a wasteful number, since it uses less digits than its factorization.

9554891401440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870493 (or 870465 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 9554891401440 in words is "nine trillion, five hundred fifty-four billion, eight hundred ninety-one million, four hundred one thousand, four hundred forty".