616636494289 has 16 divisors (see below), whose sum is σ = 667481704000. Its totient is φ = 567670503744.

The previous prime is 616636494263. The next prime is 616636494347. The reversal of 616636494289 is 982494636616.

It is a cyclic number.

It is not a de Polignac number, because 616636494289 - 2⁹ = 616636493777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616636494289.

It is not an unprimeable number, because it can be changed into a prime (616636494589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4014 + ... + 1110535.

It is an arithmetic number, because the mean of its divisors is an integer number (41717606500).

Almost surely, 2^616636494289 is an apocalyptic number.

It is an amenable number.

616636494289 is a deficient number, since it is larger than the sum of its proper divisors (50845209711).

616636494289 is a wasteful number, since it uses less digits than its factorization.

616636494289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115392.

The product of its digits is 80621568, while the sum is 64.

The spelling of 616636494289 in words is "six hundred sixteen billion, six hundred thirty-six million, four hundred ninety-four thousand, two hundred eighty-nine".