989999999552 has 28 divisors (see below), whose sum is σ = 1965019600560. Its totient is φ = 494876950656.

The previous prime is 989999999539. The next prime is 989999999557. The reversal of 989999999552 is 255999999989.

It is a super-2 number, since 2×989999999552² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (989999999557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662902 + ... + 2178357.

Almost surely, 2^989999999552 is an apocalyptic number.

It is an amenable number.

989999999552 is a deficient number, since it is larger than the sum of its proper divisors (975019601008).

989999999552 is a wasteful number, since it uses less digits than its factorization.

989999999552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845298 (or 3845288 counting only the distinct ones).

The product of its digits is 17218688400, while the sum is 92.

The spelling of 989999999552 in words is "nine hundred eighty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred fifty-two".