648864806428 has 12 divisors (see below), whose sum is σ = 1172142876352. Its totient is φ = 313966841760.

The previous prime is 648864806419. The next prime is 648864806437. The reversal of 648864806428 is 824608468846.

648864806428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (648864806419) and next prime (648864806437).

It is a self number, because there is not a number n which added to its sum of digits gives 648864806428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2616390225 + ... + 2616390472.

Almost surely, 2^648864806428 is an apocalyptic number.

It is an amenable number.

648864806428 is a deficient number, since it is larger than the sum of its proper divisors (523278069924).

648864806428 is a wasteful number, since it uses less digits than its factorization.

648864806428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232780732 (or 5232780730 counting only the distinct ones).

The product of its (nonzero) digits is 113246208, while the sum is 64.

The spelling of 648864806428 in words is "six hundred forty-eight billion, eight hundred sixty-four million, eight hundred six thousand, four hundred twenty-eight".