646456625603 has 2 divisors, whose sum is σ = 646456625604. Its totient is φ = 646456625602.

The previous prime is 646456625587. The next prime is 646456625621. The reversal of 646456625603 is 306526654646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646456625603 - 2⁴ = 646456625587 is a prime.

It is a super-2 number, since 2×646456625603² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (646456645603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323228312801 + 323228312802.

It is an arithmetic number, because the mean of its divisors is an integer number (323228312802).

Almost surely, 2^646456625603 is an apocalyptic number.

646456625603 is a deficient number, since it is larger than the sum of its proper divisors (1).

646456625603 is an equidigital number, since it uses as much as digits as its factorization.

646456625603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 53.

The spelling of 646456625603 in words is "six hundred forty-six billion, four hundred fifty-six million, six hundred twenty-five thousand, six hundred three".