42555055525 has 6 divisors (see below), whose sum is σ = 52768268882. Its totient is φ = 34044044400.

The previous prime is 42555055519. The next prime is 42555055547. The reversal of 42555055525 is 52555055524.

It can be written as a sum of positive squares in 3 ways, for example, as 172186884 + 42382868641 = 13122^2 + 205871^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42555055525 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 5 ways as a sum of consecutive naturals, for example, 851101086 + ... + 851101135.

Almost surely, 2^42555055525 is an apocalyptic number.

It is an amenable number.

42555055525 is a deficient number, since it is larger than the sum of its proper divisors (10213213357).

42555055525 is a wasteful number, since it uses less digits than its factorization.

42555055525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702202231 (or 1702202226 counting only the distinct ones).

The product of its (nonzero) digits is 1250000, while the sum is 43.

Subtracting 42555055525 from its reverse (52555055524), we obtain a palindrome (9999999999).

The spelling of 42555055525 in words is "forty-two billion, five hundred fifty-five million, fifty-five thousand, five hundred twenty-five".