67984304644 has 9 divisors (see below), whose sum is σ = 118973445717. Its totient is φ = 33991891584.

The previous prime is 67984304603. The next prime is 67984304657. The reversal of 67984304644 is 44640348976.

The square root of 67984304644 is 260738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 17197175044 + 50787129600 = 131138^2 + 225360^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 456292 + ... + 586660.

Almost surely, 2^67984304644 is an apocalyptic number.

67984304644 is the 260738-th square number.

It is an amenable number.

67984304644 is a deficient number, since it is larger than the sum of its proper divisors (50989141073).

67984304644 is an frugal number, since it uses more digits than its factorization.

67984304644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260742 (or 130371 counting only the distinct ones).

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

The spelling of 67984304644 in words is "sixty-seven billion, nine hundred eighty-four million, three hundred four thousand, six hundred forty-four".