42543634519 has 2 divisors, whose sum is σ = 42543634520. Its totient is φ = 42543634518.

The previous prime is 42543634487. The next prime is 42543634531. The reversal of 42543634519 is 91543634524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42543634519 - 2⁵ = 42543634487 is a prime.

It is a super-2 number, since 2×42543634519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42543638519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271817259 + 21271817260.

It is an arithmetic number, because the mean of its divisors is an integer number (21271817260).

Almost surely, 2^42543634519 is an apocalyptic number.

42543634519 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543634519 is an equidigital number, since it uses as much as digits as its factorization.

42543634519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 46.

The spelling of 42543634519 in words is "forty-two billion, five hundred forty-three million, six hundred thirty-four thousand, five hundred nineteen".