648941952943 has 2 divisors, whose sum is σ = 648941952944. Its totient is φ = 648941952942.

The previous prime is 648941952859. The next prime is 648941953013. The reversal of 648941952943 is 349259149846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648941952943 is a prime.

It is a super-2 number, since 2×648941952943² (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 (648945952943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324470976471 + 324470976472.

It is an arithmetic number, because the mean of its divisors is an integer number (324470976472).

Almost surely, 2^648941952943 is an apocalyptic number.

648941952943 is a deficient number, since it is larger than the sum of its proper divisors (1).

648941952943 is an equidigital number, since it uses as much as digits as its factorization.

648941952943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 64.

The spelling of 648941952943 in words is "six hundred forty-eight billion, nine hundred forty-one million, nine hundred fifty-two thousand, nine hundred forty-three".