525648905 has 16 divisors (see below), whose sum is σ = 650538000. Its totient is φ = 407485440.

The previous prime is 525648901. The next prime is 525648911. The reversal of 525648905 is 509846525.

It can be written as a sum of positive squares in 8 ways, for example, as 164762896 + 360886009 = 12836^2 + 18997^2 .

It is not a de Polignac number, because 525648905 - 2² = 525648901 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (525648901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21941 + ... + 39149.

It is an arithmetic number, because the mean of its divisors is an integer number (40658625).

Almost surely, 2^525648905 is an apocalyptic number.

It is an amenable number.

525648905 is a deficient number, since it is larger than the sum of its proper divisors (124889095).

525648905 is a wasteful number, since it uses less digits than its factorization.

525648905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17404.

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 525648905 is about 22927.0343699311. The cubic root of 525648905 is about 807.0465550313.

The spelling of 525648905 in words is "five hundred twenty-five million, six hundred forty-eight thousand, nine hundred five".