612246643555691 has 2 divisors, whose sum is σ = 612246643555692. Its totient is φ = 612246643555690.

The previous prime is 612246643555639. The next prime is 612246643555709. The reversal of 612246643555691 is 196555346642216.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612246643555691 is a prime.

It is not a weakly prime, because it can be changed into another prime (612246643555991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306123321777845 + 306123321777846.

It is an arithmetic number, because the mean of its divisors is an integer number (306123321777846).

Almost surely, 2^{612246643555691} is an apocalyptic number.

612246643555691 is a deficient number, since it is larger than the sum of its proper divisors (1).

612246643555691 is an equidigital number, since it uses as much as digits as its factorization.

612246643555691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936000, while the sum is 65.

The spelling of 612246643555691 in words is "six hundred twelve trillion, two hundred forty-six billion, six hundred forty-three million, five hundred fifty-five thousand, six hundred ninety-one".