42217941605 has 18 divisors (see below), whose sum is σ = 58937289894. Its totient is φ = 28947240336.

The previous prime is 42217941569. The next prime is 42217941611. The reversal of 42217941605 is 50614971224.

It can be written as a sum of positive squares in only one way, i.e., 33774353284 + 8443588321 = 183778^2 + 91889^2 .

It is not a de Polignac number, because 42217941605 - 2²⁴ = 42201164389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3209552 + ... + 3222678.

It is an arithmetic number, because the mean of its divisors is an integer number (3274293883).

Almost surely, 2^42217941605 is an apocalyptic number.

It is an amenable number.

42217941605 is a deficient number, since it is larger than the sum of its proper divisors (16719348289).

42217941605 is an frugal number, since it uses more digits than its factorization.

42217941605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26273 (or 13139 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 42217941605 in words is "forty-two billion, two hundred seventeen million, nine hundred forty-one thousand, six hundred five".