505404403425 has 18 divisors (see below), whose sum is σ = 905235442982. Its totient is φ = 269549015040.

The previous prime is 505404403417. The next prime is 505404403453. The reversal of 505404403425 is 524304404505.

505404403425 is a `hidden beast` number, since 50 + 540 + 4 + 40 + 3 + 4 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 140114713761 + 365289689664 = 374319^2 + 604392^2 .

It is not a de Polignac number, because 505404403425 - 2³ = 505404403417 is a prime.

It is a super-2 number, since 2×505404403425² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 505404403425.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1123120672 + ... + 1123121121.

Almost surely, 2^505404403425 is an apocalyptic number.

It is an amenable number.

505404403425 is a deficient number, since it is larger than the sum of its proper divisors (399831039557).

505404403425 is a wasteful number, since it uses less digits than its factorization.

505404403425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246241809 (or 2246241801 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 36.

The spelling of 505404403425 in words is "five hundred five billion, four hundred four million, four hundred three thousand, four hundred twenty-five".