42558039617 has 8 divisors (see below), whose sum is σ = 42809998824. Its totient is φ = 42306149248.

The previous prime is 42558039571. The next prime is 42558039697. The reversal of 42558039617 is 71693085524.

It is a happy number.

It is a Cunningham number, because it is equal to 206296²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 88661056 + 42469378561 = 9416^2 + 206081^2 .

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 42558039617 - 2⁶ = 42558039553 is a prime.

It is a super-2 number, since 2×42558039617² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42558039697) 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, 1761773 + ... + 1785765.

It is an arithmetic number, because the mean of its divisors is an integer number (5351249853).

It is a 2-persistent number, because it is pandigital, and so is 2⋅42558039617 = 85116079234, but 3⋅42558039617 = 127674118851 is not.

Almost surely, 2^42558039617 is an apocalyptic number.

It is an amenable number.

42558039617 is a deficient number, since it is larger than the sum of its proper divisors (251959207).

42558039617 is a wasteful number, since it uses less digits than its factorization.

42558039617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34419.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 42558039617 in words is "forty-two billion, five hundred fifty-eight million, thirty-nine thousand, six hundred seventeen".