42549243608693 has 2 divisors, whose sum is σ = 42549243608694. Its totient is φ = 42549243608692.

The previous prime is 42549243608539. The next prime is 42549243608713. The reversal of 42549243608693 is 39680634294524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24188858459089 + 18360385149604 = 4918217^2 + 4284902^2 .

It is a cyclic number.

It is not a de Polignac number, because 42549243608693 - 2⁸ = 42549243608437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42549243601693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21274621804346 + 21274621804347.

It is an arithmetic number, because the mean of its divisors is an integer number (21274621804347).

Almost surely, 2^{42549243608693} is an apocalyptic number.

It is an amenable number.

42549243608693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42549243608693 is an equidigital number, since it uses as much as digits as its factorization.

42549243608693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268738560, while the sum is 65.

The spelling of 42549243608693 in words is "forty-two trillion, five hundred forty-nine billion, two hundred forty-three million, six hundred eight thousand, six hundred ninety-three".