612478320017 has 4 divisors (see below), whose sum is σ = 622518948276. Its totient is φ = 602437691760.

The previous prime is 612478319989. The next prime is 612478320061. The reversal of 612478320017 is 710023874216.

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 29704867201 + 582773452816 = 172351^2 + 763396^2 .

It is a cyclic number.

It is not a de Polignac number, because 612478320017 - 2¹⁰ = 612478318993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612478320217) 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, 5020314038 + ... + 5020314159.

It is an arithmetic number, because the mean of its divisors is an integer number (155629737069).

Almost surely, 2^612478320017 is an apocalyptic number.

It is an amenable number.

612478320017 is a deficient number, since it is larger than the sum of its proper divisors (10040628259).

612478320017 is a wasteful number, since it uses less digits than its factorization.

612478320017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040628258.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 612478320017 in words is "six hundred twelve billion, four hundred seventy-eight million, three hundred twenty thousand, seventeen".