648516418804811 has 2 divisors, whose sum is σ = 648516418804812. Its totient is φ = 648516418804810.

The previous prime is 648516418804789. The next prime is 648516418804841. The reversal of 648516418804811 is 118408814615846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648516418804811 - 2³⁴ = 648499238935627 is a prime.

It is not a weakly prime, because it can be changed into another prime (648516418804841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324258209402405 + 324258209402406.

It is an arithmetic number, because the mean of its divisors is an integer number (324258209402406).

Almost surely, 2^{648516418804811} is an apocalyptic number.

648516418804811 is a deficient number, since it is larger than the sum of its proper divisors (1).

648516418804811 is an equidigital number, since it uses as much as digits as its factorization.

648516418804811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47185920, while the sum is 65.

The spelling of 648516418804811 in words is "six hundred forty-eight trillion, five hundred sixteen billion, four hundred eighteen million, eight hundred four thousand, eight hundred eleven".