42647185885 has 4 divisors (see below), whose sum is σ = 51176623068. Its totient is φ = 34117748704.

The previous prime is 42647185883. The next prime is 42647185897. The reversal of 42647185885 is 58858174624.

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 25906190116 + 16740995769 = 160954^2 + 129387^2 .

It is a cyclic number.

It is not a de Polignac number, because 42647185885 - 2¹ = 42647185883 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42647185883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4264718584 + ... + 4264718593.

It is an arithmetic number, because the mean of its divisors is an integer number (12794155767).

Almost surely, 2^42647185885 is an apocalyptic number.

It is an amenable number.

42647185885 is a deficient number, since it is larger than the sum of its proper divisors (8529437183).

42647185885 is an equidigital number, since it uses as much as digits as its factorization.

42647185885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529437182.

The product of its digits is 17203200, while the sum is 58.

The spelling of 42647185885 in words is "forty-two billion, six hundred forty-seven million, one hundred eighty-five thousand, eight hundred eighty-five".