42729813899 has 4 divisors (see below), whose sum is σ = 42792376536. Its totient is φ = 42667251264.

The previous prime is 42729813857. The next prime is 42729813901. The reversal of 42729813899 is 99831892724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42729813899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42729813199) 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, 31280294 + ... + 31281659.

It is an arithmetic number, because the mean of its divisors is an integer number (10698094134).

Almost surely, 2^42729813899 is an apocalyptic number.

42729813899 is a deficient number, since it is larger than the sum of its proper divisors (62562637).

42729813899 is an equidigital number, since it uses as much as digits as its factorization.

42729813899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62562636.

The product of its digits is 15676416, while the sum is 62.

The spelling of 42729813899 in words is "forty-two billion, seven hundred twenty-nine million, eight hundred thirteen thousand, eight hundred ninety-nine".