8513957040665 has 16 divisors (see below), whose sum is σ = 10526400424848. Its totient is φ = 6605907250176.

The previous prime is 8513957040607. The next prime is 8513957040697. The reversal of 8513957040665 is 5660407593158.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1543939849 + 8512413100816 = 39293^2 + 2917604^2 .

It is a cyclic number.

It is not a de Polignac number, because 8513957040665 - 2²⁰ = 8513955992089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73458692 + ... + 73574501.

It is an arithmetic number, because the mean of its divisors is an integer number (657900026553).

Almost surely, 2^{8513957040665} is an apocalyptic number.

It is an amenable number.

8513957040665 is a deficient number, since it is larger than the sum of its proper divisors (2012443384183).

8513957040665 is a wasteful number, since it uses less digits than its factorization.

8513957040665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147033548.

The product of its (nonzero) digits is 27216000, while the sum is 59.

The spelling of 8513957040665 in words is "eight trillion, five hundred thirteen billion, nine hundred fifty-seven million, forty thousand, six hundred sixty-five".