646454600649 has 32 divisors (see below), whose sum is σ = 1125142435200. Its totient is φ = 361652921280.

The previous prime is 646454600633. The next prime is 646454600663. The reversal of 646454600649 is 946006454646.

646454600649 is a `hidden beast` number, since 64 + 64 + 5 + 460 + 0 + 64 + 9 = 666.

It is not a de Polignac number, because 646454600649 - 2⁴ = 646454600633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646454600595 and 646454600604.

It is not an unprimeable number, because it can be changed into a prime (646454600629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83712094 + ... + 83719815.

It is an arithmetic number, because the mean of its divisors is an integer number (35160701100).

Almost surely, 2^646454600649 is an apocalyptic number.

It is an amenable number.

646454600649 is a deficient number, since it is larger than the sum of its proper divisors (478687834551).

646454600649 is a wasteful number, since it uses less digits than its factorization.

646454600649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167431942 (or 167431936 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 54.

The spelling of 646454600649 in words is "six hundred forty-six billion, four hundred fifty-four million, six hundred thousand, six hundred forty-nine".