42505411450525 has 6 divisors (see below), whose sum is σ = 52706710198682. Its totient is φ = 34004329160400.

The previous prime is 42505411450511. The next prime is 42505411450571. The reversal of 42505411450525 is 52505411450524.

It can be written as a sum of positive squares in 3 ways, for example, as 3008937767641 + 39496473682884 = 1734629^2 + 6284622^2 .

It is not a de Polignac number, because 42505411450525 - 2²⁷ = 42505277232797 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, 850108228986 + ... + 850108229035.

Almost surely, 2^{42505411450525} is an apocalyptic number.

It is an amenable number.

42505411450525 is a deficient number, since it is larger than the sum of its proper divisors (10201298748157).

42505411450525 is a wasteful number, since it uses less digits than its factorization.

42505411450525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700216458031 (or 1700216458026 counting only the distinct ones).

The product of its (nonzero) digits is 800000, while the sum is 43.

Subtracting 42505411450525 from its reverse (52505411450524), we obtain a palindrome (9999999999999).

The spelling of 42505411450525 in words is "forty-two trillion, five hundred five billion, four hundred eleven million, four hundred fifty thousand, five hundred twenty-five".