42521542539 has 16 divisors (see below), whose sum is σ = 64808847360. Its totient is φ = 24292730880.

The previous prime is 42521542501. The next prime is 42521542577. The reversal of 42521542539 is 93524512524.

It is an interprime number because it is at equal distance from previous prime (42521542501) and next prime (42521542577).

It is not a de Polignac number, because 42521542539 - 2⁷ = 42521542411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42521542539.

It is not an unprimeable number, because it can be changed into a prime (42521542579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120822 + ... + 315659.

It is an arithmetic number, because the mean of its divisors is an integer number (4050552960).

Almost surely, 2^42521542539 is an apocalyptic number.

42521542539 is a deficient number, since it is larger than the sum of its proper divisors (22287304821).

42521542539 is a wasteful number, since it uses less digits than its factorization.

42521542539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441130.

The product of its digits is 432000, while the sum is 42.

The spelling of 42521542539 in words is "forty-two billion, five hundred twenty-one million, five hundred forty-two thousand, five hundred thirty-nine".