9990655984 has 20 divisors (see below), whose sum is σ = 19475655016. Its totient is φ = 4964680512.

The previous prime is 9990655963. The next prime is 9990655993. The reversal of 9990655984 is 4895560999.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912779 + ... + 1917994.

Almost surely, 2^9990655984 is an apocalyptic number.

It is an amenable number.

9990655984 is a deficient number, since it is larger than the sum of its proper divisors (9484999032).

9990655984 is a wasteful number, since it uses less digits than its factorization.

9990655984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830944 (or 3830938 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 64.

The square root of 9990655984 is about 99953.2690010687. The cubic root of 9990655984 is about 2153.7634451772.

The spelling of 9990655984 in words is "nine billion, nine hundred ninety million, six hundred fifty-five thousand, nine hundred eighty-four".