9640558898 has 4 divisors (see below), whose sum is σ = 14460838350. Its totient is φ = 4820279448.

The previous prime is 9640558897. The next prime is 9640558927. The reversal of 9640558898 is 8988550469.

9640558898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8988550469 = 569 ⋅15797101.

It can be written as a sum of positive squares in only one way, i.e., 8686799209 + 953759689 = 93203^2 + 30883^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9640558898.

It is not an unprimeable number, because it can be changed into a prime (9640558897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2410139723 + ... + 2410139726.

Almost surely, 2^9640558898 is an apocalyptic number.

9640558898 is a deficient number, since it is larger than the sum of its proper divisors (4820279452).

9640558898 is a wasteful number, since it uses less digits than its factorization.

9640558898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820279451.

The product of its (nonzero) digits is 24883200, while the sum is 62.

The square root of 9640558898 is about 98186.3478188287. The cubic root of 9640558898 is about 2128.3060067471.

The spelling of 9640558898 in words is "nine billion, six hundred forty million, five hundred fifty-eight thousand, eight hundred ninety-eight".