616485716569 has 4 divisors (see below), whose sum is σ = 628117522596. Its totient is φ = 604853910544.

The previous prime is 616485716563. The next prime is 616485716617. The reversal of 616485716569 is 965617584616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 455845076569 + 160640640000 = 675163^2 + 400800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616485716569 is a prime.

It is a super-2 number, since 2×616485716569² (a number of 24 digits) contains 22 as substring.

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 616485716569.

It is not an unprimeable number, because it can be changed into a prime (616485716563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5815902934 + ... + 5815903039.

It is an arithmetic number, because the mean of its divisors is an integer number (157029380649).

Almost surely, 2^616485716569 is an apocalyptic number.

It is an amenable number.

616485716569 is a deficient number, since it is larger than the sum of its proper divisors (11631806027).

616485716569 is a wasteful number, since it uses less digits than its factorization.

616485716569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11631806026.

The product of its digits is 65318400, while the sum is 64.

The spelling of 616485716569 in words is "six hundred sixteen billion, four hundred eighty-five million, seven hundred sixteen thousand, five hundred sixty-nine".