8465640539816 has 96 divisors (see below), whose sum is σ = 16718076325080. Its totient is φ = 4017630489600.

The previous prime is 8465640539789. The next prime is 8465640539819. The reversal of 8465640539816 is 6189350465648.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 2085742524100 + 6379898015716 = 1444210^2 + 2525846^2 .

It is a super-2 number, since 2×8465640539816² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8465640539819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 918078086 + ... + 918087306.

Almost surely, 2^{8465640539816} is an apocalyptic number.

It is an amenable number.

8465640539816 is a deficient number, since it is larger than the sum of its proper divisors (8252435785264).

8465640539816 is a wasteful number, since it uses less digits than its factorization.

8465640539816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11583 (or 11550 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 65.

The spelling of 8465640539816 in words is "eight trillion, four hundred sixty-five billion, six hundred forty million, five hundred thirty-nine thousand, eight hundred sixteen".