9986018615631 has 24 divisors (see below), whose sum is σ = 15273803716704. Its totient is φ = 6265298457600.

The previous prime is 9986018615621. The next prime is 9986018615647. The reversal of 9986018615631 is 1365168106899.

9986018615631 is a `hidden beast` number, since 9 + 9 + 8 + 6 + 0 + 1 + 8 + 61 + 563 + 1 = 666.

It is not a de Polignac number, because 9986018615631 - 2³⁵ = 9951658877263 is a prime.

It is a super-2 number, since 2×9986018615631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986018615621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85770 + ... + 4469831.

It is an arithmetic number, because the mean of its divisors is an integer number (636408488196).

Almost surely, 2^{9986018615631} is an apocalyptic number.

9986018615631 is a deficient number, since it is larger than the sum of its proper divisors (5287785101073).

9986018615631 is a wasteful number, since it uses less digits than its factorization.

9986018615631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569951 (or 4569948 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 9986018615631 in words is "nine trillion, nine hundred eighty-six billion, eighteen million, six hundred fifteen thousand, six hundred thirty-one".