9908553978945 has 24 divisors (see below), whose sum is σ = 17416725872832. Its totient is φ = 5210131668000.

The previous prime is 9908553978929. The next prime is 9908553979001. The reversal of 9908553978945 is 5498793558099.

9908553978945 is a `hidden beast` number, since 9 + 9 + 0 + 8 + 5 + 539 + 78 + 9 + 4 + 5 = 666.

It is not a de Polignac number, because 9908553978945 - 2⁴ = 9908553978929 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1550631231 + ... + 1550637620.

It is an arithmetic number, because the mean of its divisors is an integer number (725696911368).

Almost surely, 2^{9908553978945} is an apocalyptic number.

It is an amenable number.

9908553978945 is a deficient number, since it is larger than the sum of its proper divisors (7508171893887).

9908553978945 is a wasteful number, since it uses less digits than its factorization.

9908553978945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101268933 (or 3101268930 counting only the distinct ones).

The product of its (nonzero) digits is 4408992000, while the sum is 81.

The spelling of 9908553978945 in words is "nine trillion, nine hundred eight billion, five hundred fifty-three million, nine hundred seventy-eight thousand, nine hundred forty-five".