990612889811472 has 80 divisors (see below), whose sum is σ = 2651506542005760. Its totient is φ = 318436671522816.

The previous prime is 990612889811459. The next prime is 990612889811473. The reversal of 990612889811472 is 274118988216099.

It is a junction number, because it is equal to n+sod(n) for n = 990612889811394 and 990612889811403.

It is not an unprimeable number, because it can be changed into a prime (990612889811473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2467841472 + ... + 2468242847.

It is an arithmetic number, because the mean of its divisors is an integer number (33143831775072).

Almost surely, 2^{990612889811472} is an apocalyptic number.

It is an amenable number.

990612889811472 is an abundant number, since it is smaller than the sum of its proper divisors (1660893652194288).

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

990612889811472 is a wasteful number, since it uses less digits than its factorization.

990612889811472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936084480 (or 4936084474 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 75.

The spelling of 990612889811472 in words is "nine hundred ninety trillion, six hundred twelve billion, eight hundred eighty-nine million, eight hundred eleven thousand, four hundred seventy-two".