648828657 has 16 divisors (see below), whose sum is σ = 962231680. Its totient is φ = 432100656.

The previous prime is 648828641. The next prime is 648828727. The reversal of 648828657 is 756828846.

It is not a de Polignac number, because 648828657 - 2⁴ = 648828641 is a prime.

It is a super-2 number, since 2×648828657² = 841957252288847298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648828617) 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, 14868 + ... + 38970.

It is an arithmetic number, because the mean of its divisors is an integer number (60139480).

Almost surely, 2^648828657 is an apocalyptic number.

It is an amenable number.

648828657 is a deficient number, since it is larger than the sum of its proper divisors (313403023).

648828657 is a wasteful number, since it uses less digits than its factorization.

648828657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25109 (or 25103 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 648828657 is about 25472.1152831876. The cubic root of 648828657 is about 865.7184524076.

The spelling of 648828657 in words is "six hundred forty-eight million, eight hundred twenty-eight thousand, six hundred fifty-seven".