42729171798 has 16 divisors (see below), whose sum is σ = 90485305200. Its totient is φ = 13405230336.

The previous prime is 42729171773. The next prime is 42729171893. The reversal of 42729171798 is 89717192724.

It is a congruent number.

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, 209456623 + ... + 209456826.

It is an arithmetic number, because the mean of its divisors is an integer number (5655331575).

Almost surely, 2^42729171798 is an apocalyptic number.

42729171798 is an abundant number, since it is smaller than the sum of its proper divisors (47756133402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42729171798 is a wasteful number, since it uses less digits than its factorization.

42729171798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418913471.

The product of its digits is 3556224, while the sum is 57.

The spelling of 42729171798 in words is "forty-two billion, seven hundred twenty-nine million, one hundred seventy-one thousand, seven hundred ninety-eight".