99689454494208 has 1280 divisors, whose sum is σ = 326679091200000. Its totient is φ = 29893378572288.

The previous prime is 99689454494171. The next prime is 99689454494213. The reversal of 99689454494208 is 80249445498699.

99689454494208 is a `hidden beast` number, since 9 + 9 + 6 + 89 + 45 + 4 + 494 + 2 + 0 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 208119946513 + ... + 208119946991.

It is an arithmetic number, because the mean of its divisors is an integer number (255218040000).

Almost surely, 2^{99689454494208} 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 99689454494208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163339545600000).

99689454494208 is an abundant number, since it is smaller than the sum of its proper divisors (226989636705792).

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

99689454494208 is a wasteful number, since it uses less digits than its factorization.

99689454494208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 6449725440, while the sum is 81.

The spelling of 99689454494208 in words is "ninety-nine trillion, six hundred eighty-nine billion, four hundred fifty-four million, four hundred ninety-four thousand, two hundred eight".