9887690878893 has 12 divisors (see below), whose sum is σ = 15122350756188. Its totient is φ = 6204041335680.

The previous prime is 9887690878883. The next prime is 9887690878921. The reversal of 9887690878893 is 3988780967889.

It can be written as a sum of positive squares in 2 ways, for example, as 9066343815369 + 821347063524 = 3011037^2 + 906282^2 .

It is not a de Polignac number, because 9887690878893 - 2⁹ = 9887690878381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9887690878873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32312715138 + ... + 32312715443.

It is an arithmetic number, because the mean of its divisors is an integer number (1260195896349).

Almost surely, 2^{9887690878893} is an apocalyptic number.

It is an amenable number.

9887690878893 is a deficient number, since it is larger than the sum of its proper divisors (5234659877295).

9887690878893 is a wasteful number, since it uses less digits than its factorization.

9887690878893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64625430604 (or 64625430601 counting only the distinct ones).

The product of its (nonzero) digits is 21069103104, while the sum is 90.

The spelling of 9887690878893 in words is "nine trillion, eight hundred eighty-seven billion, six hundred ninety million, eight hundred seventy-eight thousand, eight hundred ninety-three".