400524340525 has 24 divisors (see below), whose sum is σ = 527736461544. Its totient is φ = 300497971200.

The previous prime is 400524340507. The next prime is 400524340529. The reversal of 400524340525 is 525043425004.

It can be written as a sum of positive squares in 12 ways, for example, as 37183023241 + 363341317284 = 192829^2 + 602778^2 .

It is not a de Polignac number, because 400524340525 - 2³⁷ = 263085387053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400524340529) 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 23 ways as a sum of consecutive naturals, for example, 1557462 + ... + 1796311.

It is an arithmetic number, because the mean of its divisors is an integer number (21989019231).

Almost surely, 2^400524340525 is an apocalyptic number.

It is an amenable number.

400524340525 is a deficient number, since it is larger than the sum of its proper divisors (127212121019).

400524340525 is a wasteful number, since it uses less digits than its factorization.

400524340525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354081 (or 3354076 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

Adding to 400524340525 its reverse (525043425004), we get a palindrome (925567765529).

The spelling of 400524340525 in words is "four hundred billion, five hundred twenty-four million, three hundred forty thousand, five hundred twenty-five".