643622952912337 has 2 divisors, whose sum is σ = 643622952912338. Its totient is φ = 643622952912336.

The previous prime is 643622952912323. The next prime is 643622952912343. The reversal of 643622952912337 is 733219259226346.

It is a happy number.

643622952912337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641052571208256 + 2570381704081 = 25319016^2 + 1603241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643622952912337 is a prime.

It is not a weakly prime, because it can be changed into another prime (643622952912347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321811476456168 + 321811476456169.

It is an arithmetic number, because the mean of its divisors is an integer number (321811476456169).

Almost surely, 2^{643622952912337} is an apocalyptic number.

It is an amenable number.

643622952912337 is a deficient number, since it is larger than the sum of its proper divisors (1).

643622952912337 is an equidigital number, since it uses as much as digits as its factorization.

643622952912337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176359680, while the sum is 64.

The spelling of 643622952912337 in words is "six hundred forty-three trillion, six hundred twenty-two billion, nine hundred fifty-two million, nine hundred twelve thousand, three hundred thirty-seven".