7985586865 has 8 divisors (see below), whose sum is σ = 9623833128. Its totient is φ = 6361050240.

The previous prime is 7985586859. The next prime is 7985586877. The reversal of 7985586865 is 5686855897.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 456206881 + 7529379984 = 21359^2 + 86772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7985586865 - 2¹³ = 7985578673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7985586865.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3426126 + ... + 3428455.

It is an arithmetic number, because the mean of its divisors is an integer number (1202979141).

Almost surely, 2^7985586865 is an apocalyptic number.

It is an amenable number.

7985586865 is a deficient number, since it is larger than the sum of its proper divisors (1638246263).

7985586865 is a wasteful number, since it uses less digits than its factorization.

7985586865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854819.

The product of its digits is 145152000, while the sum is 67.

The square root of 7985586865 is about 89362.1109027758. The cubic root of 7985586865 is about 1998.7981833797.

The spelling of 7985586865 in words is "seven billion, nine hundred eighty-five million, five hundred eighty-six thousand, eight hundred sixty-five".