9987456756772 has 108 divisors (see below), whose sum is σ = 20303103330048. Its totient is φ = 4291127517600.

The previous prime is 9987456756769. The next prime is 9987456756773. The reversal of 9987456756772 is 2776576547899.

Its product of digits (11202105600) is a multiple of the sum of its prime factors (360150).

It is not an unprimeable number, because it can be changed into a prime (9987456756773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27562393 + ... + 27922399.

Almost surely, 2^{9987456756772} is an apocalyptic number.

It is an amenable number.

9987456756772 is an abundant number, since it is smaller than the sum of its proper divisors (10315646573276).

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

9987456756772 is a wasteful number, since it uses less digits than its factorization.

9987456756772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360150 (or 360094 counting only the distinct ones).

The product of its digits is 11202105600, while the sum is 82.

The spelling of 9987456756772 in words is "nine trillion, nine hundred eighty-seven billion, four hundred fifty-six million, seven hundred fifty-six thousand, seven hundred seventy-two".