9911454840 has 448 divisors, whose sum is σ = 38907302400. Its totient is φ = 2224371456.

The previous prime is 9911454821. The next prime is 9911454853. The reversal of 9911454840 is 484541199.

It is a happy number.

9911454840 is a `hidden beast` number, since 9 + 91 + 14 + 548 + 4 + 0 = 666.

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 111 ways as a sum of consecutive naturals, for example, 12042669 + ... + 12043491.

Almost surely, 2^9911454840 is an apocalyptic number.

9911454840 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 9911454840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19453651200).

9911454840 is an abundant number, since it is smaller than the sum of its proper divisors (28995847560).

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

9911454840 is a wasteful number, since it uses less digits than its factorization.

9911454840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 9911454840 is about 99556.2898063201. The cubic root of 9911454840 is about 2148.0570035745.

The spelling of 9911454840 in words is "nine billion, nine hundred eleven million, four hundred fifty-four thousand, eight hundred forty".