525745649 has 24 divisors (see below), whose sum is σ = 635592672. Its totient is φ = 430859520.

The previous prime is 525745643. The next prime is 525745657. The reversal of 525745649 is 946547525.

It is a de Polignac number, because none of the positive numbers 2^k-525745649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (525745643) 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, 76649 + ... + 83225.

It is an arithmetic number, because the mean of its divisors is an integer number (26483028).

Almost surely, 2^525745649 is an apocalyptic number.

It is an amenable number.

525745649 is a deficient number, since it is larger than the sum of its proper divisors (109847023).

525745649 is a wasteful number, since it uses less digits than its factorization.

525745649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657 (or 6644 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 47.

The square root of 525745649 is about 22929.1440965423. The cubic root of 525745649 is about 807.0960634400.

The spelling of 525745649 in words is "five hundred twenty-five million, seven hundred forty-five thousand, six hundred forty-nine".