42543634523 has 8 divisors (see below), whose sum is σ = 45821388816. Its totient is φ = 39266618400.

The previous prime is 42543634519. The next prime is 42543634531. The reversal of 42543634523 is 32543634524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42543634523 - 2² = 42543634519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42543634123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61808 + ... + 298173.

It is an arithmetic number, because the mean of its divisors is an integer number (5727673602).

Almost surely, 2^42543634523 is an apocalyptic number.

42543634523 is a deficient number, since it is larger than the sum of its proper divisors (3277754293).

42543634523 is a wasteful number, since it uses less digits than its factorization.

42543634523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369085.

The product of its digits is 1036800, while the sum is 41.

Subtracting from 42543634523 its reverse (32543634524), we obtain a palindrome (9999999999).

The spelling of 42543634523 in words is "forty-two billion, five hundred forty-three million, six hundred thirty-four thousand, five hundred twenty-three".