9912915463440 has 320 divisors, whose sum is σ = 35584241248512. Its totient is φ = 2256125952000.

The previous prime is 9912915463331. The next prime is 9912915463459. The reversal of 9912915463440 is 443645192199.

It is a happy number.

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, 17721474 + ... + 18272286.

Almost surely, 2^{9912915463440} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9912915463440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17792120624256).

9912915463440 is an abundant number, since it is smaller than the sum of its proper divisors (25671325785072).

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

9912915463440 is a wasteful number, since it uses less digits than its factorization.

9912915463440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551258 (or 551252 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 9912915463440 in words is "nine trillion, nine hundred twelve billion, nine hundred fifteen million, four hundred sixty-three thousand, four hundred forty".