9878681690 has 8 divisors (see below), whose sum is σ = 17781627060. Its totient is φ = 3951472672.

The previous prime is 9878681653. The next prime is 9878681719. The reversal of 9878681690 is 961868789.

It can be written as a sum of positive squares in 2 ways, for example, as 9878173321 + 508369 = 99389^2 + 713^2 .

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

It is a super-2 number, since 2×9878681690² (a number of 21 digits) contains 22 as substring.

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, 493934075 + ... + 493934094.

Almost surely, 2^9878681690 is an apocalyptic number.

9878681690 is a deficient number, since it is larger than the sum of its proper divisors (7902945370).

9878681690 is a wasteful number, since it uses less digits than its factorization.

9878681690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987868176.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The square root of 9878681690 is about 99391.5574382452. The cubic root of 9878681690 is about 2145.6868056048.

The spelling of 9878681690 in words is "nine billion, eight hundred seventy-eight million, six hundred eighty-one thousand, six hundred ninety".