42518504447 has 4 divisors (see below), whose sum is σ = 43507306920. Its totient is φ = 41529701976.

The previous prime is 42518504333. The next prime is 42518504489. The reversal of 42518504447 is 74440581524.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42518504447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42518504398 and 42518504407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42518501447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494401172 + ... + 494401257.

It is an arithmetic number, because the mean of its divisors is an integer number (10876826730).

Almost surely, 2^42518504447 is an apocalyptic number.

42518504447 is a deficient number, since it is larger than the sum of its proper divisors (988802473).

42518504447 is an equidigital number, since it uses as much as digits as its factorization.

42518504447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988802472.

The product of its (nonzero) digits is 716800, while the sum is 44.

The spelling of 42518504447 in words is "forty-two billion, five hundred eighteen million, five hundred four thousand, four hundred forty-seven".