42723117305 has 8 divisors (see below), whose sum is σ = 55928444544. Its totient is φ = 31071358000.

The previous prime is 42723117301. The next prime is 42723117313. The reversal of 42723117305 is 50371132724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42723117305 - 2² = 42723117301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42723117301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388391921 + ... + 388392030.

It is an arithmetic number, because the mean of its divisors is an integer number (6991055568).

Almost surely, 2^42723117305 is an apocalyptic number.

It is an amenable number.

42723117305 is a deficient number, since it is larger than the sum of its proper divisors (13205327239).

42723117305 is a wasteful number, since it uses less digits than its factorization.

42723117305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776783967.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 42723117305 in words is "forty-two billion, seven hundred twenty-three million, one hundred seventeen thousand, three hundred five".