42543634525 has 12 divisors (see below), whose sum is σ = 60290408032. Its totient is φ = 29172777840.

The previous prime is 42543634519. The next prime is 42543634531. The reversal of 42543634525 is 52543634524.

It is an interprime number because it is at equal distance from previous prime (42543634519) and next prime (42543634531).

It is not a de Polignac number, because 42543634525 - 2¹¹ = 42543632477 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 121553067 + ... + 121553416.

Almost surely, 2^42543634525 is an apocalyptic number.

It is an amenable number.

42543634525 is a deficient number, since it is larger than the sum of its proper divisors (17746773507).

42543634525 is a wasteful number, since it uses less digits than its factorization.

42543634525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243106500 (or 243106495 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 43.

Subtracting 42543634525 from its reverse (52543634524), we obtain a palindrome (9999999999).

The spelling of 42543634525 in words is "forty-two billion, five hundred forty-three million, six hundred thirty-four thousand, five hundred twenty-five".