648313511389 has 2 divisors, whose sum is σ = 648313511390. Its totient is φ = 648313511388.

The previous prime is 648313511327. The next prime is 648313511423. The reversal of 648313511389 is 983115313846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 559668572100 + 88644939289 = 748110^2 + 297733^2 .

It is a cyclic number.

It is not a de Polignac number, because 648313511389 - 2⁹ = 648313510877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648313511089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324156755694 + 324156755695.

It is an arithmetic number, because the mean of its divisors is an integer number (324156755695).

Almost surely, 2^648313511389 is an apocalyptic number.

It is an amenable number.

648313511389 is a deficient number, since it is larger than the sum of its proper divisors (1).

648313511389 is an equidigital number, since it uses as much as digits as its factorization.

648313511389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The spelling of 648313511389 in words is "six hundred forty-eight billion, three hundred thirteen million, five hundred eleven thousand, three hundred eighty-nine".