42536144163523 has 2 divisors, whose sum is σ = 42536144163524. Its totient is φ = 42536144163522.

The previous prime is 42536144163517. The next prime is 42536144163533. The reversal of 42536144163523 is 32536144163524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42536144163523 - 2⁹ = 42536144163011 is a prime.

It is not a weakly prime, because it can be changed into another prime (42536144163533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21268072081761 + 21268072081762.

It is an arithmetic number, because the mean of its divisors is an integer number (21268072081762).

Almost surely, 2^{42536144163523} is an apocalyptic number.

42536144163523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42536144163523 is an equidigital number, since it uses as much as digits as its factorization.

42536144163523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 49.

Subtracting from 42536144163523 its reverse (32536144163524), we obtain a palindrome (9999999999999).

The spelling of 42536144163523 in words is "forty-two trillion, five hundred thirty-six billion, one hundred forty-four million, one hundred sixty-three thousand, five hundred twenty-three".