9987653412 has 36 divisors (see below), whose sum is σ = 27541712016. Its totient is φ = 3026561520.

The previous prime is 9987653393. The next prime is 9987653443. The reversal of 9987653412 is 2143567899.

9987653412 is a `hidden beast` number, since 9 + 98 + 7 + 6 + 534 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12610278 + ... + 12611069.

It is an arithmetic number, because the mean of its divisors is an integer number (765047556).

Almost surely, 2^9987653412 is an apocalyptic number.

It is an amenable number.

9987653412 is an abundant number, since it is smaller than the sum of its proper divisors (17554058604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9987653412 is a wasteful number, since it uses less digits than its factorization.

9987653412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25221368 (or 25221363 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 9987653412 is about 99938.2479934484. The cubic root of 9987653412 is about 2153.5476609559.

The spelling of 9987653412 in words is "nine billion, nine hundred eighty-seven million, six hundred fifty-three thousand, four hundred twelve".