996021220986 has 192 divisors, whose sum is σ = 2465900236800. Its totient is φ = 287817235200.

The previous prime is 996021220967. The next prime is 996021221021. The reversal of 996021220986 is 689022120699.

It is a happy number.

996021220986 is a `hidden beast` number, since 9 + 9 + 602 + 1 + 2 + 20 + 9 + 8 + 6 = 666.

It is a super-3 number, since 3×996021220986³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 167705605 + ... + 167711543.

It is an arithmetic number, because the mean of its divisors is an integer number (12843230400).

Almost surely, 2^996021220986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 996021220986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232950118400).

996021220986 is an abundant number, since it is smaller than the sum of its proper divisors (1469879015814).

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

996021220986 is a wasteful number, since it uses less digits than its factorization.

996021220986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385 (or 6382 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 996021220986 in words is "nine hundred ninety-six billion, twenty-one million, two hundred twenty thousand, nine hundred eighty-six".