42439884745 has 8 divisors (see below), whose sum is σ = 51452891784. Its totient is φ = 33601887744.

The previous prime is 42439884727. The next prime is 42439884761. The reversal of 42439884745 is 54748893424.

It can be written as a sum of positive squares in 4 ways, for example, as 6817474624 + 35622410121 = 82568^2 + 188739^2 .

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 42439884745 - 2¹⁷ = 42439753673 is a prime.

It is a super-2 number, since 2×42439884745² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42439884745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43751974 + ... + 43752943.

It is an arithmetic number, because the mean of its divisors is an integer number (6431611473).

Almost surely, 2^42439884745 is an apocalyptic number.

It is an amenable number.

42439884745 is a deficient number, since it is larger than the sum of its proper divisors (9013007039).

42439884745 is an equidigital number, since it uses as much as digits as its factorization.

42439884745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87505019.

The product of its digits is 30965760, while the sum is 58.

The spelling of 42439884745 in words is "forty-two billion, four hundred thirty-nine million, eight hundred eighty-four thousand, seven hundred forty-five".