400404324425 has 54 divisors (see below), whose sum is σ = 591310212318. Its totient is φ = 268176263040.

The previous prime is 400404324403. The next prime is 400404324427. The reversal of 400404324425 is 524423404004.

It can be written as a sum of positive squares in 3 ways, for example, as 91327257616 + 309077066809 = 302204^2 + 555947^2 .

It is not a de Polignac number, because 400404324425 - 2¹⁰ = 400404323401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400404324391 and 400404324400.

It is not an unprimeable number, because it can be changed into a prime (400404324427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2176637 + ... + 2353413.

It is an arithmetic number, because the mean of its divisors is an integer number (10950189117).

Almost surely, 2^400404324425 is an apocalyptic number.

It is an amenable number.

400404324425 is a deficient number, since it is larger than the sum of its proper divisors (190905887893).

400404324425 is a wasteful number, since it uses less digits than its factorization.

400404324425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176887 (or 176832 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 32.

Adding to 400404324425 its reverse (524423404004), we get a palindrome (924827728429).

The spelling of 400404324425 in words is "four hundred billion, four hundred four million, three hundred twenty-four thousand, four hundred twenty-five".