42729745805 has 8 divisors (see below), whose sum is σ = 53505073152. Its totient is φ = 32697544528.

The previous prime is 42729745801. The next prime is 42729745823. The reversal of 42729745805 is 50854792724.

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 42729745805 - 2² = 42729745801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42729745801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185781389 + ... + 185781618.

It is an arithmetic number, because the mean of its divisors is an integer number (6688134144).

Almost surely, 2^42729745805 is an apocalyptic number.

It is an amenable number.

42729745805 is a deficient number, since it is larger than the sum of its proper divisors (10775327347).

42729745805 is a wasteful number, since it uses less digits than its factorization.

42729745805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371563035.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 42729745805 in words is "forty-two billion, seven hundred twenty-nine million, seven hundred forty-five thousand, eight hundred five".