42729745858 has 8 divisors (see below), whose sum is σ = 64095634620. Its totient is φ = 21364534320.

The previous prime is 42729745823. The next prime is 42729745873. The reversal of 42729745858 is 85854792724.

It is a happy number.

42729745858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42560927809 + 168818049 = 206303^2 + 12993^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 42729745796 and 42729745805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40368 + ... + 295108.

Almost surely, 2^42729745858 is an apocalyptic number.

42729745858 is a deficient number, since it is larger than the sum of its proper divisors (21365888762).

42729745858 is a wasteful number, since it uses less digits than its factorization.

42729745858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338612.

The product of its digits is 45158400, while the sum is 61.

The spelling of 42729745858 in words is "forty-two billion, seven hundred twenty-nine million, seven hundred forty-five thousand, eight hundred fifty-eight".