7987208685 has 64 divisors (see below), whose sum is σ = 13927334400. Its totient is φ = 3892396032.

The previous prime is 7987208639. The next prime is 7987208701. The reversal of 7987208685 is 5868027897.

It is not a de Polignac number, because 7987208685 - 2¹⁹ = 7986684397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7915461 + ... + 7916469.

It is an arithmetic number, because the mean of its divisors is an integer number (217614600).

Almost surely, 2^7987208685 is an apocalyptic number.

It is an amenable number.

7987208685 is a deficient number, since it is larger than the sum of its proper divisors (5940125715).

7987208685 is a wasteful number, since it uses less digits than its factorization.

7987208685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The square root of 7987208685 is about 89371.1848696211. The cubic root of 7987208685 is about 1998.9334884610.

The spelling of 7987208685 in words is "seven billion, nine hundred eighty-seven million, two hundred eight thousand, six hundred eighty-five".