42642228729 has 16 divisors (see below), whose sum is σ = 57209765760. Its totient is φ = 28251500160.

The previous prime is 42642228721. The next prime is 42642228731. The reversal of 42642228729 is 92782224624.

It is not a de Polignac number, because 42642228729 - 2³ = 42642228721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42642228721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3380967 + ... + 3393555.

It is an arithmetic number, because the mean of its divisors is an integer number (3575610360).

Almost surely, 2^42642228729 is an apocalyptic number.

It is an amenable number.

42642228729 is a deficient number, since it is larger than the sum of its proper divisors (14567537031).

42642228729 is a wasteful number, since it uses less digits than its factorization.

42642228729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19520.

The product of its digits is 1548288, while the sum is 48.

The spelling of 42642228729 in words is "forty-two billion, six hundred forty-two million, two hundred twenty-eight thousand, seven hundred twenty-nine".