42534643523 has 4 divisors (see below), whose sum is σ = 42540479880. Its totient is φ = 42528807168.

The previous prime is 42534643517. The next prime is 42534643597. The reversal of 42534643523 is 32534643524.

42534643523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42534643523 - 2¹⁴ = 42534627139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42534643513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2907233 + ... + 2921826.

It is an arithmetic number, because the mean of its divisors is an integer number (10635119970).

Almost surely, 2^42534643523 is an apocalyptic number.

42534643523 is a deficient number, since it is larger than the sum of its proper divisors (5836357).

42534643523 is an equidigital number, since it uses as much as digits as its factorization.

42534643523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836356.

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

Subtracting from 42534643523 its reverse (32534643524), we obtain a palindrome (9999999999).

The spelling of 42534643523 in words is "forty-two billion, five hundred thirty-four million, six hundred forty-three thousand, five hundred twenty-three".