9990958618 has 8 divisors (see below), whose sum is σ = 15154825140. Its totient is φ = 4939350240.

The previous prime is 9990958591. The next prime is 9990958657. The reversal of 9990958618 is 8168590999.

It can be written as a sum of positive squares in 2 ways, for example, as 9990602209 + 356409 = 99953^2 + 597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9990958618.

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, 28064313 + ... + 28064668.

Almost surely, 2^9990958618 is an apocalyptic number.

9990958618 is a deficient number, since it is larger than the sum of its proper divisors (5163866522).

9990958618 is a wasteful number, since it uses less digits than its factorization.

9990958618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56129072.

The product of its (nonzero) digits is 12597120, while the sum is 64.

The square root of 9990958618 is about 99954.7828670544. The cubic root of 9990958618 is about 2153.7851920130.

The spelling of 9990958618 in words is "nine billion, nine hundred ninety million, nine hundred fifty-eight thousand, six hundred eighteen".