648646711 has 2 divisors, whose sum is σ = 648646712. Its totient is φ = 648646710.

The previous prime is 648646693. The next prime is 648646727. The reversal of 648646711 is 117646846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648646711 is a prime.

It is a super-3 number, since 3×648646711³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648646771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324323355 + 324323356.

It is an arithmetic number, because the mean of its divisors is an integer number (324323356).

Almost surely, 2^648646711 is an apocalyptic number.

648646711 is a deficient number, since it is larger than the sum of its proper divisors (1).

648646711 is an equidigital number, since it uses as much as digits as its factorization.

648646711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 648646711 is about 25468.5435586725. The cubic root of 648646711 is about 865.6375225999.

The spelling of 648646711 in words is "six hundred forty-eight million, six hundred forty-six thousand, seven hundred eleven".