648704620504 has 8 divisors (see below), whose sum is σ = 1216321163460. Its totient is φ = 324352310248.

The previous prime is 648704620471. The next prime is 648704620511. The reversal of 648704620504 is 405026407846.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40544038774 + ... + 40544038789.

Almost surely, 2^648704620504 is an apocalyptic number.

It is an amenable number.

648704620504 is a deficient number, since it is larger than the sum of its proper divisors (567616542956).

648704620504 is a wasteful number, since it uses less digits than its factorization.

648704620504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81088077569 (or 81088077565 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 648704620504 in words is "six hundred forty-eight billion, seven hundred four million, six hundred twenty thousand, five hundred four".