648865310251 has 2 divisors, whose sum is σ = 648865310252. Its totient is φ = 648865310250.

The previous prime is 648865310243. The next prime is 648865310263. The reversal of 648865310251 is 152013568846.

648865310251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648865310251 - 2³ = 648865310243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648865310195 and 648865310204.

It is not a weakly prime, because it can be changed into another prime (648865310281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324432655125 + 324432655126.

It is an arithmetic number, because the mean of its divisors is an integer number (324432655126).

Almost surely, 2^648865310251 is an apocalyptic number.

648865310251 is a deficient number, since it is larger than the sum of its proper divisors (1).

648865310251 is an equidigital number, since it uses as much as digits as its factorization.

648865310251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 648865310251 in words is "six hundred forty-eight billion, eight hundred sixty-five million, three hundred ten thousand, two hundred fifty-one".