1646067340864 has 14 divisors (see below), whose sum is σ = 3266414879654. Its totient is φ = 823033670400.

The previous prime is 1646067340817. The next prime is 1646067340901. The reversal of 1646067340864 is 4680437606461.

It can be written as a sum of positive squares in only one way, i.e., 1245884580864 + 400182760000 = 1116192^2 + 632600^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859901037 + ... + 12859901164.

Almost surely, 2^{1646067340864} is an apocalyptic number.

It is an amenable number.

1646067340864 is a deficient number, since it is larger than the sum of its proper divisors (1620347538790).

1646067340864 is an equidigital number, since it uses as much as digits as its factorization.

1646067340864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25719802213 (or 25719802203 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 1646067340864 in words is "one trillion, six hundred forty-six billion, sixty-seven million, three hundred forty thousand, eight hundred sixty-four".