1223873138944 has 27 divisors (see below), whose sum is σ = 2443000856023. Its totient is φ = 611927719168.

The previous prime is 1223873138923. The next prime is 1223873138953. The reversal of 1223873138944 is 4498313783221.

The square root of 1223873138944 is 1106288.

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 polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17666037 + ... + 17735179.

Almost surely, 2^{1223873138944} is an apocalyptic number.

1223873138944 is the 1106288-th square number.

It is an amenable number.

1223873138944 is a deficient number, since it is larger than the sum of its proper divisors (1219127717079).

1223873138944 is an frugal number, since it uses more digits than its factorization.

1223873138944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138302 (or 69145 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 55.

The spelling of 1223873138944 in words is "one trillion, two hundred twenty-three billion, eight hundred seventy-three million, one hundred thirty-eight thousand, nine hundred forty-four".