646849430450 has 24 divisors (see below), whose sum is σ = 1203206946672. Its totient is φ = 258725362320.

The previous prime is 646849430431. The next prime is 646849430501. The reversal of 646849430450 is 54034948646.

646849430450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 646849430392 and 646849430401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570317 + ... + 1272383.

It is an arithmetic number, because the mean of its divisors is an integer number (50133622778).

Almost surely, 2^646849430450 is an apocalyptic number.

646849430450 is a deficient number, since it is larger than the sum of its proper divisors (556357516222).

646849430450 is a wasteful number, since it uses less digits than its factorization.

646849430450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720506 (or 720501 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 53.

The spelling of 646849430450 in words is "six hundred forty-six billion, eight hundred forty-nine million, four hundred thirty thousand, four hundred fifty".