648577018387 has 2 divisors, whose sum is σ = 648577018388. Its totient is φ = 648577018386.

The previous prime is 648577018307. The next prime is 648577018391. The reversal of 648577018387 is 783810775846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648577018387 - 2²⁷ = 648442800659 is a prime.

It is not a weakly prime, because it can be changed into another prime (648577018307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324288509193 + 324288509194.

It is an arithmetic number, because the mean of its divisors is an integer number (324288509194).

Almost surely, 2^648577018387 is an apocalyptic number.

648577018387 is a deficient number, since it is larger than the sum of its proper divisors (1).

648577018387 is an equidigital number, since it uses as much as digits as its factorization.

648577018387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 648577018387 in words is "six hundred forty-eight billion, five hundred seventy-seven million, eighteen thousand, three hundred eighty-seven".