643461014659 has 2 divisors, whose sum is σ = 643461014660. Its totient is φ = 643461014658.

The previous prime is 643461014653. The next prime is 643461014663. The reversal of 643461014659 is 956410164346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643461014659 - 2⁵ = 643461014627 is a prime.

It is not a weakly prime, because it can be changed into another prime (643461014653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321730507329 + 321730507330.

It is an arithmetic number, because the mean of its divisors is an integer number (321730507330).

Almost surely, 2^643461014659 is an apocalyptic number.

643461014659 is a deficient number, since it is larger than the sum of its proper divisors (1).

643461014659 is an equidigital number, since it uses as much as digits as its factorization.

643461014659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 643461014659 in words is "six hundred forty-three billion, four hundred sixty-one million, fourteen thousand, six hundred fifty-nine".