420402444204025 has 12 divisors (see below), whose sum is σ = 525912296575932. Its totient is φ = 333345654871040.

The previous prime is 420402444204019. The next prime is 420402444204049. The reversal of 420402444204025 is 520402444204024.

It can be written as a sum of positive squares in 6 ways, for example, as 56536022673936 + 363866421530089 = 7519044^2 + 19075283^2 .

It is not a de Polignac number, because 420402444204025 - 2³⁹ = 419852688390137 is a prime.

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, 74407509424 + ... + 74407515073.

It is an arithmetic number, because the mean of its divisors is an integer number (43826024714661).

Almost surely, 2^{420402444204025} is an apocalyptic number.

It is an amenable number.

420402444204025 is a deficient number, since it is larger than the sum of its proper divisors (105509852371907).

420402444204025 is a wasteful number, since it uses less digits than its factorization.

420402444204025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148815024620 (or 148815024615 counting only the distinct ones).

The product of its (nonzero) digits is 327680, while the sum is 37.

Adding to 420402444204025 its reverse (520402444204024), we get a palindrome (940804888408049).

Subtracting 420402444204025 from its reverse (520402444204024), we obtain a palindrome (99999999999999).

The spelling of 420402444204025 in words is "four hundred twenty trillion, four hundred two billion, four hundred forty-four million, two hundred four thousand, twenty-five".