420551155025 has 6 divisors (see below), whose sum is σ = 521483432262. Its totient is φ = 336440924000.

The previous prime is 420551155001. The next prime is 420551155081. The reversal of 420551155025 is 520551155024.

It can be written as a sum of positive squares in 3 ways, for example, as 7679367424 + 412871787601 = 87632^2 + 642551^2 .

It is not a de Polignac number, because 420551155025 - 2³⁴ = 403371285841 is a prime.

It is a Duffinian 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, 8411023076 + ... + 8411023125.

It is an arithmetic number, because the mean of its divisors is an integer number (86913905377).

Almost surely, 2^420551155025 is an apocalyptic number.

It is an amenable number.

420551155025 is a deficient number, since it is larger than the sum of its proper divisors (100932277237).

420551155025 is a wasteful number, since it uses less digits than its factorization.

420551155025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16822046211 (or 16822046206 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

Subtracting 420551155025 from its reverse (520551155024), we obtain a palindrome (99999999999).

The spelling of 420551155025 in words is "four hundred twenty billion, five hundred fifty-one million, one hundred fifty-five thousand, twenty-five".