42505605529 has 4 divisors (see below), whose sum is σ = 45005935284. Its totient is φ = 40005275776.

The previous prime is 42505605517. The next prime is 42505605551. The reversal of 42505605529 is 92550650524.

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 15494025625 + 27011579904 = 124475^2 + 164352^2 .

It is a cyclic number.

It is not a de Polignac number, because 42505605529 - 2¹⁵ = 42505572761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42505605509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250164852 + ... + 1250164885.

It is an arithmetic number, because the mean of its divisors is an integer number (11251483821).

Almost surely, 2^42505605529 is an apocalyptic number.

It is an amenable number.

42505605529 is a deficient number, since it is larger than the sum of its proper divisors (2500329755).

42505605529 is a wasteful number, since it uses less digits than its factorization.

42505605529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500329754.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 42505605529 in words is "forty-two billion, five hundred five million, six hundred five thousand, five hundred twenty-nine".