9987731282025 has 576 divisors, whose sum is σ = 23939119226880. Its totient is φ = 3867595776000.

The previous prime is 9987731282021. The next prime is 9987731282033. The reversal of 9987731282025 is 5202821377899.

It is not a de Polignac number, because 9987731282025 - 2² = 9987731282021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9987731282021) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 1766799099 + ... + 1766804751.

It is an arithmetic number, because the mean of its divisors is an integer number (41560970880).

Almost surely, 2^{9987731282025} is an apocalyptic number.

9987731282025 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9987731282025 is an abundant number, since it is smaller than the sum of its proper divisors (13951387944855).

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

9987731282025 is a wasteful number, since it uses less digits than its factorization.

9987731282025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886 (or 5878 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The spelling of 9987731282025 in words is "nine trillion, nine hundred eighty-seven billion, seven hundred thirty-one million, two hundred eighty-two thousand, twenty-five".