648583361 has 2 divisors, whose sum is σ = 648583362. Its totient is φ = 648583360.

The previous prime is 648583349. The next prime is 648583379. The reversal of 648583361 is 163385846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410467600 + 238115761 = 20260^2 + 15431^2 .

It is a cyclic number.

It is not a de Polignac number, because 648583361 - 2²⁶ = 581474497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (648583301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324291680 + 324291681.

It is an arithmetic number, because the mean of its divisors is an integer number (324291681).

Almost surely, 2^648583361 is an apocalyptic number.

It is an amenable number.

648583361 is a deficient number, since it is larger than the sum of its proper divisors (1).

648583361 is an equidigital number, since it uses as much as digits as its factorization.

648583361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 648583361 is about 25467.2998372423. The cubic root of 648583361 is about 865.6093408889.

The spelling of 648583361 in words is "six hundred forty-eight million, five hundred eighty-three thousand, three hundred sixty-one".