648680877 has 12 divisors (see below), whose sum is σ = 1009059324. Its totient is φ = 399188160.

The previous prime is 648680863. The next prime is 648680899. The reversal of 648680877 is 778086846.

648680877 is a `hidden beast` number, since 6 + 486 + 80 + 87 + 7 = 666.

648680877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 179265321 + 469415556 = 13389^2 + 21666^2 .

It is not a de Polignac number, because 648680877 - 2¹⁸ = 648418733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648680827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2772024 + ... + 2772257.

It is an arithmetic number, because the mean of its divisors is an integer number (84088277).

Almost surely, 2^648680877 is an apocalyptic number.

It is an amenable number.

648680877 is a deficient number, since it is larger than the sum of its proper divisors (360378447).

648680877 is a wasteful number, since it uses less digits than its factorization.

648680877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544300 (or 5544297 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 648680877 is about 25469.2142988354. The cubic root of 648680877 is about 865.6527208333.

The spelling of 648680877 in words is "six hundred forty-eight million, six hundred eighty thousand, eight hundred seventy-seven".