42816641765 has 16 divisors (see below), whose sum is σ = 52620834816. Its totient is φ = 33427464000.

The previous prime is 42816641761. The next prime is 42816641771. The reversal of 42816641765 is 56714661824.

It is not a de Polignac number, because 42816641765 - 2² = 42816641761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42816641761) 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 15 ways as a sum of consecutive naturals, for example, 160955 + ... + 333975.

It is an arithmetic number, because the mean of its divisors is an integer number (3288802176).

Almost surely, 2^42816641765 is an apocalyptic number.

It is an amenable number.

42816641765 is a deficient number, since it is larger than the sum of its proper divisors (9804193051).

42816641765 is a wasteful number, since it uses less digits than its factorization.

42816641765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174220.

The product of its digits is 1935360, while the sum is 50.

The spelling of 42816641765 in words is "forty-two billion, eight hundred sixteen million, six hundred forty-one thousand, seven hundred sixty-five".