7984515665 has 32 divisors (see below), whose sum is σ = 11450695680. Its totient is φ = 5225863104.

The previous prime is 7984515653. The next prime is 7984515689. The reversal of 7984515665 is 5665154897.

It is not a de Polignac number, because 7984515665 - 2²⁸ = 7716080209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7984515665.

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 31 ways as a sum of consecutive naturals, for example, 375242 + ... + 395948.

It is an arithmetic number, because the mean of its divisors is an integer number (357834240).

Almost surely, 2^7984515665 is an apocalyptic number.

It is an amenable number.

7984515665 is a deficient number, since it is larger than the sum of its proper divisors (3466180015).

7984515665 is a wasteful number, since it uses less digits than its factorization.

7984515665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21221.

The product of its digits is 9072000, while the sum is 56.

The square root of 7984515665 is about 89356.1171101341. The cubic root of 7984515665 is about 1998.7088053376.

The spelling of 7984515665 in words is "seven billion, nine hundred eighty-four million, five hundred fifteen thousand, six hundred sixty-five".