501604256625 has 16 divisors (see below), whose sum is σ = 834669483648. Its totient is φ = 267522270000.

The previous prime is 501604256623. The next prime is 501604256639. The reversal of 501604256625 is 526652406105.

It is a happy number.

It is not a de Polignac number, because 501604256625 - 2¹ = 501604256623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501604256623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668805301 + ... + 668806050.

It is an arithmetic number, because the mean of its divisors is an integer number (52166842728).

Almost surely, 2^501604256625 is an apocalyptic number.

It is an amenable number.

501604256625 is a deficient number, since it is larger than the sum of its proper divisors (333065227023).

501604256625 is a wasteful number, since it uses less digits than its factorization.

501604256625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337611369 (or 1337611359 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 501604256625 in words is "five hundred one billion, six hundred four million, two hundred fifty-six thousand, six hundred twenty-five".