1378663221004 has 24 divisors (see below), whose sum is σ = 2446201447088. Its totient is φ = 679752311040.

The previous prime is 1378663220981. The next prime is 1378663221017. The reversal of 1378663221004 is 4001223668731.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992104 + ... + 1934320.

Almost surely, 2^{1378663221004} is an apocalyptic number.

It is an amenable number.

1378663221004 is a deficient number, since it is larger than the sum of its proper divisors (1067538226084).

1378663221004 is a wasteful number, since it uses less digits than its factorization.

1378663221004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947305 (or 947303 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

Adding to 1378663221004 its reverse (4001223668731), we get a palindrome (5379886889735).

The spelling of 1378663221004 in words is "one trillion, three hundred seventy-eight billion, six hundred sixty-three million, two hundred twenty-one thousand, four".