42536870729 has 4 divisors (see below), whose sum is σ = 42540109584. Its totient is φ = 42533631876.

The previous prime is 42536870723. The next prime is 42536870731. The reversal of 42536870729 is 92707863524.

42536870729 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42536870729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42536870723) 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, 1599647 + ... + 1626020.

It is an arithmetic number, because the mean of its divisors is an integer number (10635027396).

Almost surely, 2^42536870729 is an apocalyptic number.

It is an amenable number.

42536870729 is a deficient number, since it is larger than the sum of its proper divisors (3238855).

42536870729 is a wasteful number, since it uses less digits than its factorization.

42536870729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238854.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 42536870729 in words is "forty-two billion, five hundred thirty-six million, eight hundred seventy thousand, seven hundred twenty-nine".