646063043401 has 2 divisors, whose sum is σ = 646063043402. Its totient is φ = 646063043400.

The previous prime is 646063043371. The next prime is 646063043411. The reversal of 646063043401 is 104340360646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 581404725001 + 64658318400 = 762499^2 + 254280^2 .

It is a cyclic number.

It is not a de Polignac number, because 646063043401 - 2⁵ = 646063043369 is a prime.

It is not a weakly prime, because it can be changed into another prime (646063043411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323031521700 + 323031521701.

It is an arithmetic number, because the mean of its divisors is an integer number (323031521701).

Almost surely, 2^646063043401 is an apocalyptic number.

It is an amenable number.

646063043401 is a deficient number, since it is larger than the sum of its proper divisors (1).

646063043401 is an equidigital number, since it uses as much as digits as its factorization.

646063043401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 646063043401 in words is "six hundred forty-six billion, sixty-three million, forty-three thousand, four hundred one".