8947897965440 has 256 divisors, whose sum is σ = 24959083392000. Its totient is φ = 3066223749120.

The previous prime is 8947897965427. The next prime is 8947897965449. The reversal of 8947897965440 is 445697987498.

It is a Harshad number since it is a multiple of its sum of digits (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8947897965449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458128475 + ... + 458148005.

It is an arithmetic number, because the mean of its divisors is an integer number (97496419500).

Almost surely, 2^{8947897965440} is an apocalyptic number.

8947897965440 is a gapful number since it is divisible by the number (80) 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 8947897965440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12479541696000).

8947897965440 is an abundant number, since it is smaller than the sum of its proper divisors (16011185426560).

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

8947897965440 is a wasteful number, since it uses less digits than its factorization.

8947897965440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21658 (or 21632 counting only the distinct ones).

The product of its (nonzero) digits is 4389396480, while the sum is 80.

The spelling of 8947897965440 in words is "eight trillion, nine hundred forty-seven billion, eight hundred ninety-seven million, nine hundred sixty-five thousand, four hundred forty".