525540663424 has 128 divisors (see below), whose sum is σ = 1272374438400. Its totient is φ = 211071565824.

The previous prime is 525540663413. The next prime is 525540663457. The reversal of 525540663424 is 424366045525.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3475017 + ... + 3623095.

It is an arithmetic number, because the mean of its divisors is an integer number (9940425300).

Almost surely, 2^525540663424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525540663424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636187219200).

525540663424 is an abundant number, since it is smaller than the sum of its proper divisors (746833774976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525540663424 is a wasteful number, since it uses less digits than its factorization.

525540663424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148350 (or 148338 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 46.

The spelling of 525540663424 in words is "five hundred twenty-five billion, five hundred forty million, six hundred sixty-three thousand, four hundred twenty-four".