42536666663525 has 12 divisors (see below), whose sum is σ = 53069058487872. Its totient is φ = 33820564411440.

The previous prime is 42536666663509. The next prime is 42536666663551. The reversal of 42536666663525 is 52536666663524.

It is not a de Polignac number, because 42536666663525 - 2⁴ = 42536666663509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5219218829 + ... + 5219226978.

It is an arithmetic number, because the mean of its divisors is an integer number (4422421540656).

Almost surely, 2^{42536666663525} is an apocalyptic number.

It is an amenable number.

42536666663525 is a deficient number, since it is larger than the sum of its proper divisors (10532391824347).

42536666663525 is a wasteful number, since it uses less digits than its factorization.

42536666663525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10438445980 (or 10438445975 counting only the distinct ones).

The product of its digits is 839808000, while the sum is 65.

Subtracting 42536666663525 from its reverse (52536666663524), we obtain a palindrome (9999999999999).

The spelling of 42536666663525 in words is "forty-two trillion, five hundred thirty-six billion, six hundred sixty-six million, six hundred sixty-three thousand, five hundred twenty-five".