42508908769 has 4 divisors (see below), whose sum is σ = 42596196544. Its totient is φ = 42421620996.

The previous prime is 42508908763. The next prime is 42508908803. The reversal of 42508908769 is 96780980524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42508908769 - 2⁵ = 42508908737 is a prime.

It is a super-3 number, since 3×42508908769³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42508908763) 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, 43643157 + ... + 43644130.

It is an arithmetic number, because the mean of its divisors is an integer number (10649049136).

Almost surely, 2^42508908769 is an apocalyptic number.

It is an amenable number.

42508908769 is a deficient number, since it is larger than the sum of its proper divisors (87287775).

42508908769 is an equidigital number, since it uses as much as digits as its factorization.

42508908769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87287774.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 42508908769 in words is "forty-two billion, five hundred eight million, nine hundred eight thousand, seven hundred sixty-nine".