42645485825 has 12 divisors (see below), whose sum is σ = 53747296188. Its totient is φ = 33557102400.

The previous prime is 42645485803. The next prime is 42645485843. The reversal of 42645485825 is 52858454624.

It can be written as a sum of positive squares in 6 ways, for example, as 11679341041 + 30966144784 = 108071^2 + 175972^2 .

It is not a de Polignac number, because 42645485825 - 2⁸ = 42645485569 is a prime.

It is a super-2 number, since 2×42645485825² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 13980602 + ... + 13983651.

It is an arithmetic number, because the mean of its divisors is an integer number (4478941349).

Almost surely, 2^42645485825 is an apocalyptic number.

It is an amenable number.

42645485825 is a deficient number, since it is larger than the sum of its proper divisors (11101810363).

42645485825 is a wasteful number, since it uses less digits than its factorization.

42645485825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27964324 (or 27964319 counting only the distinct ones).

The product of its digits is 12288000, while the sum is 53.

The spelling of 42645485825 in words is "forty-two billion, six hundred forty-five million, four hundred eighty-five thousand, eight hundred twenty-five".