525643346525 has 24 divisors (see below), whose sum is σ = 711115777344. Its totient is φ = 382251830400.

The previous prime is 525643346509. The next prime is 525643346551.

It is a happy number.

525643346525 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 525643346525 - 2⁴ = 525643346509 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3222329 + ... + 3381521.

It is an arithmetic number, because the mean of its divisors is an integer number (29629824056).

Almost surely, 2^525643346525 is an apocalyptic number.

525643346525 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

525643346525 is a deficient number, since it is larger than the sum of its proper divisors (185472430819).

525643346525 is a wasteful number, since it uses less digits than its factorization.

525643346525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171221 (or 171216 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 50.

The spelling of 525643346525 in words is "five hundred twenty-five billion, six hundred forty-three million, three hundred forty-six thousand, five hundred twenty-five".