42505509713 has 4 divisors (see below), whose sum is σ = 42506842548. Its totient is φ = 42504176880.

The previous prime is 42505509677. The next prime is 42505509737. The reversal of 42505509713 is 31790550524.

42505509713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8661652624 + 33843857089 = 93068^2 + 183967^2 .

It is a cyclic number.

It is not a de Polignac number, because 42505509713 - 2²⁴ = 42488732497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42505509793) 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, 617378 + ... + 682763.

It is an arithmetic number, because the mean of its divisors is an integer number (10626710637).

Almost surely, 2^42505509713 is an apocalyptic number.

It is an amenable number.

42505509713 is a deficient number, since it is larger than the sum of its proper divisors (1332835).

42505509713 is a wasteful number, since it uses less digits than its factorization.

42505509713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332834.

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 42505509713 in words is "forty-two billion, five hundred five million, five hundred nine thousand, seven hundred thirteen".