999618859008 has 624 divisors, whose sum is σ = 3733535909376. Its totient is φ = 259621355520.

The previous prime is 999618858923. The next prime is 999618859027. The reversal of 999618859008 is 800958816999.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 76633735 + ... + 76646777.

It is an arithmetic number, because the mean of its divisors is an integer number (5983230624).

Almost surely, 2^999618859008 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 999618859008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866767954688).

999618859008 is an abundant number, since it is smaller than the sum of its proper divisors (2733917050368).

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

999618859008 is a wasteful number, since it uses less digits than its factorization.

999618859008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13100 (or 13066 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 72.

The spelling of 999618859008 in words is "nine hundred ninety-nine billion, six hundred eighteen million, eight hundred fifty-nine thousand, eight".