1914243807844 has 27 divisors (see below), whose sum is σ = 3558660066507. Its totient is φ = 900798478464.

The previous prime is 1914243807841. The next prime is 1914243807859. The reversal of 1914243807844 is 4487083424191.

The square root of 1914243807844 is 1383562.

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

It can be written as a sum of positive squares in 4 ways, for example, as 67580241444 + 1846663566400 = 259962^2 + 1358920^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1914243807841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47020762 + ... + 47061454.

Almost surely, 2^{1914243807844} is an apocalyptic number.

1914243807844 is the 1383562-nd square number.

It is an amenable number.

1914243807844 is a deficient number, since it is larger than the sum of its proper divisors (1644416258663).

1914243807844 is an frugal number, since it uses more digits than its factorization.

1914243807844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81424 (or 40712 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 1914243807844 in words is "one trillion, nine hundred fourteen billion, two hundred forty-three million, eight hundred seven thousand, eight hundred forty-four".