4042646644397 has 2 divisors, whose sum is σ = 4042646644398. Its totient is φ = 4042646644396.

The previous prime is 4042646644381. The next prime is 4042646644417. The reversal of 4042646644397 is 7934466462404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3118575870601 + 924070773796 = 1765949^2 + 961286^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042646644397 - 2⁴ = 4042646644381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4042646644357) 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, 2021323322198 + 2021323322199.

It is an arithmetic number, because the mean of its divisors is an integer number (2021323322199).

Almost surely, 2^{4042646644397} is an apocalyptic number.

It is an amenable number.

4042646644397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042646644397 is an equidigital number, since it uses as much as digits as its factorization.

4042646644397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83607552, while the sum is 59.

The spelling of 4042646644397 in words is "four trillion, forty-two billion, six hundred forty-six million, six hundred forty-four thousand, three hundred ninety-seven".