1863394263844 has 9 divisors (see below), whose sum is σ = 3260944739451. Its totient is φ = 931695766860.

The previous prime is 1863394263839. The next prime is 1863394263881. The reversal of 1863394263844 is 4483624933681.

The square root of 1863394263844 is 1365062.

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

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 2388859 + ... + 3071389.

Almost surely, 2^{1863394263844} is an apocalyptic number.

1863394263844 is the 1365062-nd square number.

It is an amenable number.

1863394263844 is a deficient number, since it is larger than the sum of its proper divisors (1397550475607).

1863394263844 is an frugal number, since it uses more digits than its factorization.

1863394263844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365066 (or 682533 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 61.

The spelling of 1863394263844 in words is "one trillion, eight hundred sixty-three billion, three hundred ninety-four million, two hundred sixty-three thousand, eight hundred forty-four".