612246643555109 has 2 divisors, whose sum is σ = 612246643555110. Its totient is φ = 612246643555108.

The previous prime is 612246643555103. The next prime is 612246643555139. The reversal of 612246643555109 is 901555346642216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456196329715009 + 156050313840100 = 21358753^2 + 12492010^2 .

It is a cyclic number.

It is not a de Polignac number, because 612246643555109 - 2⁴ = 612246643555093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612246643555103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306123321777554 + 306123321777555.

It is an arithmetic number, because the mean of its divisors is an integer number (306123321777555).

Almost surely, 2^{612246643555109} is an apocalyptic number.

It is an amenable number.

612246643555109 is a deficient number, since it is larger than the sum of its proper divisors (1).

612246643555109 is an equidigital number, since it uses as much as digits as its factorization.

612246643555109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656000, while the sum is 59.

The spelling of 612246643555109 in words is "six hundred twelve trillion, two hundred forty-six billion, six hundred forty-three million, five hundred fifty-five thousand, one hundred nine".