525557609425 has 6 divisors (see below), whose sum is σ = 651691435718. Its totient is φ = 420446087520.

The previous prime is 525557609419. The next prime is 525557609471. The reversal of 525557609425 is 524906755525.

It can be written as a sum of positive squares in 3 ways, for example, as 270405136 + 525287204289 = 16444^2 + 724767^2 .

It is not a de Polignac number, because 525557609425 - 2²⁷ = 525423391697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10511152164 + ... + 10511152213.

Almost surely, 2^525557609425 is an apocalyptic number.

It is an amenable number.

525557609425 is a deficient number, since it is larger than the sum of its proper divisors (126133826293).

525557609425 is a wasteful number, since it uses less digits than its factorization.

525557609425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21022304387 (or 21022304382 counting only the distinct ones).

The product of its (nonzero) digits is 18900000, while the sum is 55.

The spelling of 525557609425 in words is "five hundred twenty-five billion, five hundred fifty-seven million, six hundred nine thousand, four hundred twenty-five".