9439856617885 has 32 divisors (see below), whose sum is σ = 12020345464320. Its totient is φ = 7092151944192.

The previous prime is 9439856617871. The next prime is 9439856617907. The reversal of 9439856617885 is 5887166589349.

It is a cyclic number.

It is not a de Polignac number, because 9439856617885 - 2⁷ = 9439856617757 is a prime.

It is a super-2 number, since 2×9439856617885² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223529142 + ... + 223571368.

It is an arithmetic number, because the mean of its divisors is an integer number (375635795760).

Almost surely, 2^{9439856617885} is an apocalyptic number.

It is an amenable number.

9439856617885 is a deficient number, since it is larger than the sum of its proper divisors (2580488846435).

9439856617885 is a wasteful number, since it uses less digits than its factorization.

9439856617885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47925.

The product of its digits is 3135283200, while the sum is 79.

The spelling of 9439856617885 in words is "nine trillion, four hundred thirty-nine billion, eight hundred fifty-six million, six hundred seventeen thousand, eight hundred eighty-five".