612478319909 has 2 divisors, whose sum is σ = 612478319910. Its totient is φ = 612478319908.

The previous prime is 612478319833. The next prime is 612478319917. The reversal of 612478319909 is 909913874216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323394667684 + 289083652225 = 568678^2 + 537665^2 .

It is a cyclic number.

It is not a de Polignac number, because 612478319909 - 2²⁰ = 612477271333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612478319989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306239159954 + 306239159955.

It is an arithmetic number, because the mean of its divisors is an integer number (306239159955).

Almost surely, 2^612478319909 is an apocalyptic number.

It is an amenable number.

612478319909 is a deficient number, since it is larger than the sum of its proper divisors (1).

612478319909 is an equidigital number, since it uses as much as digits as its factorization.

612478319909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 612478319909 in words is "six hundred twelve billion, four hundred seventy-eight million, three hundred nineteen thousand, nine hundred nine".