99563437440 has 576 divisors, whose sum is σ = 361722881520. Its totient is φ = 26202009600.

The previous prime is 99563437429. The next prime is 99563437453. The reversal of 99563437440 is 4473436599.

It is a happy number.

99563437440 is a `hidden beast` number, since 9 + 9 + 563 + 4 + 3 + 74 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 550074150 + ... + 550074330.

Almost surely, 2^99563437440 is an apocalyptic number.

99563437440 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 99563437440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180861440760).

99563437440 is an abundant number, since it is smaller than the sum of its proper divisors (262159444080).

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

99563437440 is an equidigital number, since it uses as much as digits as its factorization.

99563437440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 99563437440 in words is "ninety-nine billion, five hundred sixty-three million, four hundred thirty-seven thousand, four hundred forty".