9987616654 has 32 divisors (see below), whose sum is σ = 16260673536. Its totient is φ = 4582880640.

The previous prime is 9987616651. The next prime is 9987616711. The reversal of 9987616654 is 4566167899.

It is a junction number, because it is equal to n+sod(n) for n = 9987616592 and 9987616601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987616651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421527 + ... + 444589.

It is an arithmetic number, because the mean of its divisors is an integer number (508146048).

Almost surely, 2^9987616654 is an apocalyptic number.

9987616654 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

9987616654 is a deficient number, since it is larger than the sum of its proper divisors (6273056882).

9987616654 is a wasteful number, since it uses less digits than its factorization.

9987616654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23400.

The product of its digits is 19595520, while the sum is 61.

The square root of 9987616654 is about 99938.0640897151. The cubic root of 9987616654 is about 2153.5450190206.

The spelling of 9987616654 in words is "nine billion, nine hundred eighty-seven million, six hundred sixteen thousand, six hundred fifty-four".