42752583521 has 4 divisors (see below), whose sum is σ = 42770801712. Its totient is φ = 42734365332.

The previous prime is 42752583491. The next prime is 42752583529. The reversal of 42752583521 is 12538525724.

It is a happy number.

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 42752583521 - 2²² = 42748389217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42752583529) 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, 9105575 + ... + 9110268.

It is an arithmetic number, because the mean of its divisors is an integer number (10692700428).

Almost surely, 2^42752583521 is an apocalyptic number.

It is an amenable number.

42752583521 is a deficient number, since it is larger than the sum of its proper divisors (18218191).

42752583521 is a wasteful number, since it uses less digits than its factorization.

42752583521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18218190.

The product of its digits is 672000, while the sum is 44.

The spelling of 42752583521 in words is "forty-two billion, seven hundred fifty-two million, five hundred eighty-three thousand, five hundred twenty-one".