646262011 has 2 divisors, whose sum is σ = 646262012. Its totient is φ = 646262010.

The previous prime is 646262003. The next prime is 646262033. The reversal of 646262011 is 110262646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646262011 - 2³ = 646262003 is a prime.

It is not a weakly prime, because it can be changed into another prime (646262041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323131005 + 323131006.

It is an arithmetic number, because the mean of its divisors is an integer number (323131006).

Almost surely, 2^646262011 is an apocalyptic number.

646262011 is a deficient number, since it is larger than the sum of its proper divisors (1).

646262011 is an equidigital number, since it uses as much as digits as its factorization.

646262011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 646262011 is about 25421.6838742047. The cubic root of 646262011 is about 864.5754032293.

The spelling of 646262011 in words is "six hundred forty-six million, two hundred sixty-two thousand, eleven".