42516080669 has 4 divisors (see below), whose sum is σ = 43213065660. Its totient is φ = 41819095680.

The previous prime is 42516080639. The next prime is 42516080687. The reversal of 42516080669 is 96608061524.

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 5407837444 + 37108243225 = 73538^2 + 192635^2 .

It is a cyclic number.

It is not a de Polignac number, because 42516080669 - 2⁸ = 42516080413 is a prime.

It is a super-2 number, since 2×42516080669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42516080609) 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, 348492404 + ... + 348492525.

It is an arithmetic number, because the mean of its divisors is an integer number (10803266415).

Almost surely, 2^42516080669 is an apocalyptic number.

It is an amenable number.

42516080669 is a deficient number, since it is larger than the sum of its proper divisors (696984991).

42516080669 is an equidigital number, since it uses as much as digits as its factorization.

42516080669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696984990.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 42516080669 in words is "forty-two billion, five hundred sixteen million, eighty thousand, six hundred sixty-nine".