42728486165 has 4 divisors (see below), whose sum is σ = 51274183404. Its totient is φ = 34182788928.

The previous prime is 42728486161. The next prime is 42728486293. The reversal of 42728486165 is 56168482724.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22956189169 + 19772296996 = 151513^2 + 140614^2 .

It is a cyclic number.

It is not a de Polignac number, because 42728486165 - 2² = 42728486161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42728486161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4272848612 + ... + 4272848621.

It is an arithmetic number, because the mean of its divisors is an integer number (12818545851).

Almost surely, 2^42728486165 is an apocalyptic number.

It is an amenable number.

42728486165 is a deficient number, since it is larger than the sum of its proper divisors (8545697239).

42728486165 is an equidigital number, since it uses as much as digits as its factorization.

42728486165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545697238.

The product of its digits is 5160960, while the sum is 53.

The spelling of 42728486165 in words is "forty-two billion, seven hundred twenty-eight million, four hundred eighty-six thousand, one hundred sixty-five".