42718773641 has 8 divisors (see below), whose sum is σ = 43586215560. Its totient is φ = 41853606912.

The previous prime is 42718773637. The next prime is 42718773677. The reversal of 42718773641 is 14637781724.

It can be written as a sum of positive squares in 4 ways, for example, as 2854658041 + 39864115600 = 53429^2 + 199660^2 .

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 42718773641 - 2² = 42718773637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42718773641.

It is not an unprimeable number, because it can be changed into a prime (42718773541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 530840 + ... + 605993.

It is an arithmetic number, because the mean of its divisors is an integer number (5448276945).

Almost surely, 2^42718773641 is an apocalyptic number.

It is an amenable number.

42718773641 is a deficient number, since it is larger than the sum of its proper divisors (867441919).

42718773641 is a wasteful number, since it uses less digits than its factorization.

42718773641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137595.

The product of its digits is 1580544, while the sum is 50.

The spelling of 42718773641 in words is "forty-two billion, seven hundred eighteen million, seven hundred seventy-three thousand, six hundred forty-one".