612259765541 has 2 divisors, whose sum is σ = 612259765542. Its totient is φ = 612259765540.

The previous prime is 612259765529. The next prime is 612259765571. The reversal of 612259765541 is 145567952216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440238885025 + 172020880516 = 663505^2 + 414754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612259765541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612259765571) 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 as a sum of consecutive naturals, namely, 306129882770 + 306129882771.

It is an arithmetic number, because the mean of its divisors is an integer number (306129882771).

Almost surely, 2^612259765541 is an apocalyptic number.

It is an amenable number.

612259765541 is a deficient number, since it is larger than the sum of its proper divisors (1).

612259765541 is an equidigital number, since it uses as much as digits as its factorization.

612259765541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 53.

The spelling of 612259765541 in words is "six hundred twelve billion, two hundred fifty-nine million, seven hundred sixty-five thousand, five hundred forty-one".