646607605411 has 2 divisors, whose sum is σ = 646607605412. Its totient is φ = 646607605410.

The previous prime is 646607605409. The next prime is 646607605417. The reversal of 646607605411 is 114506706646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646607605411 - 2¹ = 646607605409 is a prime.

Together with 646607605409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (646607605417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323303802705 + 323303802706.

It is an arithmetic number, because the mean of its divisors is an integer number (323303802706).

Almost surely, 2^646607605411 is an apocalyptic number.

646607605411 is a deficient number, since it is larger than the sum of its proper divisors (1).

646607605411 is an equidigital number, since it uses as much as digits as its factorization.

646607605411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 646607605411 in words is "six hundred forty-six billion, six hundred seven million, six hundred five thousand, four hundred eleven".