648941958911 has 2 divisors, whose sum is σ = 648941958912. Its totient is φ = 648941958910.

The previous prime is 648941958799. The next prime is 648941958967. The reversal of 648941958911 is 119859149846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648941958911 - 2³⁸ = 374064051967 is a prime.

It is a super-2 number, since 2×648941958911² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648941958991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324470979455 + 324470979456.

It is an arithmetic number, because the mean of its divisors is an integer number (324470979456).

Almost surely, 2^648941958911 is an apocalyptic number.

648941958911 is a deficient number, since it is larger than the sum of its proper divisors (1).

648941958911 is an equidigital number, since it uses as much as digits as its factorization.

648941958911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 65.

The spelling of 648941958911 in words is "six hundred forty-eight billion, nine hundred forty-one million, nine hundred fifty-eight thousand, nine hundred eleven".