9868139775 has 72 divisors (see below), whose sum is σ = 19248924240. Its totient is φ = 4803448320.

The previous prime is 9868139773. The next prime is 9868139779. The reversal of 9868139775 is 5779318689.

It is not a de Polignac number, because 9868139775 - 2¹ = 9868139773 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9868139773) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 241372 + ... + 279278.

It is an arithmetic number, because the mean of its divisors is an integer number (267346170).

Almost surely, 2^9868139775 is an apocalyptic number.

9868139775 is a deficient number, since it is larger than the sum of its proper divisors (9380784465).

9868139775 is a wasteful number, since it uses less digits than its factorization.

9868139775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38025 (or 38017 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 9868139775 is about 99338.5110367575. The cubic root of 9868139775 is about 2144.9232860888.

The spelling of 9868139775 in words is "nine billion, eight hundred sixty-eight million, one hundred thirty-nine thousand, seven hundred seventy-five".