9558738981 has 48 divisors (see below), whose sum is σ = 16259218560. Its totient is φ = 5350181760.

The previous prime is 9558738967. The next prime is 9558738983. The reversal of 9558738981 is 1898378559.

9558738981 is a `hidden beast` number, since 9 + 558 + 73 + 8 + 9 + 8 + 1 = 666.

9558738981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9558738981 - 2⁵ = 9558738949 is a prime.

It is a super-2 number, since 2×9558738981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9558738983) 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 in 47 ways as a sum of consecutive naturals, for example, 6346 + ... + 138411.

It is an arithmetic number, because the mean of its divisors is an integer number (338733720).

Almost surely, 2^9558738981 is an apocalyptic number.

It is an amenable number.

9558738981 is a deficient number, since it is larger than the sum of its proper divisors (6700479579).

9558738981 is a wasteful number, since it uses less digits than its factorization.

9558738981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144826 (or 144823 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 63.

The square root of 9558738981 is about 97768.8037208188. The cubic root of 9558738981 is about 2122.2678784059.

The spelling of 9558738981 in words is "nine billion, five hundred fifty-eight million, seven hundred thirty-eight thousand, nine hundred eighty-one".