99618534288 has 1440 divisors, whose sum is σ = 399805660800. Its totient is φ = 23702740992.

The previous prime is 99618534251. The next prime is 99618534313. The reversal of 99618534288 is 88243581699.

99618534288 is a `hidden beast` number, since 9 + 9 + 6 + 18 + 534 + 2 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1364637420 + ... + 1364637492.

It is an arithmetic number, because the mean of its divisors is an integer number (277642820).

Almost surely, 2^99618534288 is an apocalyptic number.

99618534288 is a gapful number since it is divisible by the number (98) 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 99618534288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199902830400).

99618534288 is an abundant number, since it is smaller than the sum of its proper divisors (300187126512).

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

99618534288 is a wasteful number, since it uses less digits than its factorization.

99618534288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 146 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 99618534288 in words is "ninety-nine billion, six hundred eighteen million, five hundred thirty-four thousand, two hundred eighty-eight".