521247686742125 has 16 divisors (see below), whose sum is σ = 743448129206016. Its totient is φ = 357426985194000.

The previous prime is 521247686742073. The next prime is 521247686742169.

521247686742125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521247686742125 - 2¹² = 521247686738029 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 297855820121 + ... + 297855821870.

It is an arithmetic number, because the mean of its divisors is an integer number (46465508075376).

Almost surely, 2^{521247686742125} is an apocalyptic number.

It is an amenable number.

521247686742125 is a deficient number, since it is larger than the sum of its proper divisors (222200442463891).

521247686742125 is an equidigital number, since it uses as much as digits as its factorization.

521247686742125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595711642013 (or 595711642003 counting only the distinct ones).

The product of its digits is 90316800, while the sum is 62.

The spelling of 521247686742125 in words is "five hundred twenty-one trillion, two hundred forty-seven billion, six hundred eighty-six million, seven hundred forty-two thousand, one hundred twenty-five".