999955444560000 has 320 divisors, whose sum is σ = 3319413330467520. Its totient is φ = 266629782016000.

The previous prime is 999955444559999. The next prime is 999955444560013. The reversal of 999955444560000 is 65444559999.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×999955444560000² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 999955444559898 and 999955444559907.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2633330149 + ... + 2633709851.

It is an arithmetic number, because the mean of its divisors is an integer number (10373166657711).

Almost surely, 2^{999955444560000} 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 999955444560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1659706665233760).

999955444560000 is an abundant number, since it is smaller than the sum of its proper divisors (2319457885907520).

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

999955444560000 is a wasteful number, since it uses less digits than its factorization.

999955444560000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390713 (or 390686 counting only the distinct ones).

The product of its (nonzero) digits is 314928000, while the sum is 69.

The spelling of 999955444560000 in words is "nine hundred ninety-nine trillion, nine hundred fifty-five billion, four hundred forty-four million, five hundred sixty thousand".