1889684616964 has 81 divisors (see below), whose sum is σ = 3470152795837. Its totient is φ = 900367998208.

The previous prime is 1889684616961. The next prime is 1889684616977. The reversal of 1889684616964 is 4696164869881.

The square root of 1889684616964 is 1374658.

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

It can be written as a sum of positive squares in 13 ways, for example, as 69559842564 + 1820124774400 = 263742^2 + 1349120^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889684616961) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10923032382 + ... + 10923032554.

Almost surely, 2^{1889684616964} is an apocalyptic number.

1889684616964 is the 1374658-th square number.

It is an amenable number.

1889684616964 is a deficient number, since it is larger than the sum of its proper divisors (1580468178873).

1889684616964 is an equidigital number, since it uses as much as digits as its factorization.

1889684616964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 341 counting only the distinct ones).

The product of its digits is 859963392, while the sum is 76.

The spelling of 1889684616964 in words is "one trillion, eight hundred eighty-nine billion, six hundred eighty-four million, six hundred sixteen thousand, nine hundred sixty-four".