9865372675981 has 16 divisors (see below), whose sum is σ = 10340836300800. Its totient is φ = 9399069808128.

The previous prime is 9865372675973. The next prime is 9865372675987. The reversal of 9865372675981 is 1895762735689.

It is a cyclic number.

It is not a de Polignac number, because 9865372675981 - 2³ = 9865372675973 is a prime.

It is a super-2 number, since 2×9865372675981² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9865372675898 and 9865372675907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9865372675987) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2619076 + ... + 5156578.

It is an arithmetic number, because the mean of its divisors is an integer number (646302268800).

Almost surely, 2^{9865372675981} is an apocalyptic number.

It is an amenable number.

9865372675981 is a deficient number, since it is larger than the sum of its proper divisors (475463624819).

9865372675981 is a wasteful number, since it uses less digits than its factorization.

9865372675981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539308.

The product of its digits is 1371686400, while the sum is 76.

The spelling of 9865372675981 in words is "nine trillion, eight hundred sixty-five billion, three hundred seventy-two million, six hundred seventy-five thousand, nine hundred eighty-one".