99506031523440 has 240 divisors, whose sum is σ = 313955936679840. Its totient is φ = 26070329640960.

The previous prime is 99506031523421. The next prime is 99506031523453. The reversal of 99506031523440 is 4432513060599.

It is a Cunningham number, because it is equal to 9975271²-1.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299091906 + ... + 299424414.

It is an arithmetic number, because the mean of its divisors is an integer number (1308149736166).

Almost surely, 2^{99506031523440} 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 99506031523440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156977968339920).

99506031523440 is an abundant number, since it is smaller than the sum of its proper divisors (214449905156400).

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

99506031523440 is a wasteful number, since it uses less digits than its factorization.

99506031523440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332872 (or 332783 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 99506031523440 in words is "ninety-nine trillion, five hundred six billion, thirty-one million, five hundred twenty-three thousand, four hundred forty".