1643416525 has 12 divisors (see below), whose sum is σ = 2048511744. Its totient is φ = 1307846000.

The previous prime is 1643416507. The next prime is 1643416549. The reversal of 1643416525 is 5256143461.

It is not a de Polignac number, because 1643416525 - 2¹¹ = 1643414477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167311 + ... + 176860.

It is an arithmetic number, because the mean of its divisors is an integer number (170709312).

Almost surely, 2^1643416525 is an apocalyptic number.

It is an amenable number.

1643416525 is a deficient number, since it is larger than the sum of its proper divisors (405095219).

1643416525 is a wasteful number, since it uses less digits than its factorization.

1643416525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344372 (or 344367 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 1643416525 is about 40539.0740520797. The cubic root of 1643416525 is about 1180.0920461090.

Adding to 1643416525 its reverse (5256143461), we get a palindrome (6899559986).

The spelling of 1643416525 in words is "one billion, six hundred forty-three million, four hundred sixteen thousand, five hundred twenty-five".