3646127732864 has 32 divisors (see below), whose sum is σ = 7440935227740. Its totient is φ = 1778598891520.

The previous prime is 3646127732839. The next prime is 3646127732879. The reversal of 3646127732864 is 4682377216463.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2717618190400 + 928509542464 = 1648520^2 + 963592^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 347377349 + ... + 347387844.

Almost surely, 2^{3646127732864} is an apocalyptic number.

It is an amenable number.

3646127732864 is an abundant number, since it is smaller than the sum of its proper divisors (3794807494876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3646127732864 is an equidigital number, since it uses as much as digits as its factorization.

3646127732864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694765248 (or 694765236 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 59.

The spelling of 3646127732864 in words is "three trillion, six hundred forty-six billion, one hundred twenty-seven million, seven hundred thirty-two thousand, eight hundred sixty-four".