42505225643 has 4 divisors (see below), whose sum is σ = 42512307600. Its totient is φ = 42498143688.

The previous prime is 42505225573. The next prime is 42505225657. The reversal of 42505225643 is 34652250524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42505225643 - 2¹² = 42505221547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42505225597 and 42505225606.

It is not an unprimeable number, because it can be changed into a prime (42505225043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3531968 + ... + 3543981.

It is an arithmetic number, because the mean of its divisors is an integer number (10628076900).

Almost surely, 2^42505225643 is an apocalyptic number.

42505225643 is a deficient number, since it is larger than the sum of its proper divisors (7081957).

42505225643 is an equidigital number, since it uses as much as digits as its factorization.

42505225643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7081956.

The product of its (nonzero) digits is 288000, while the sum is 38.

The spelling of 42505225643 in words is "forty-two billion, five hundred five million, two hundred twenty-five thousand, six hundred forty-three".