1005402445412 has 12 divisors (see below), whose sum is σ = 1759461348540. Its totient is φ = 502699202976.

The previous prime is 1005402445403. The next prime is 1005402445427. The reversal of 1005402445412 is 2145442045001.

It can be written as a sum of positive squares in 2 ways, for example, as 311703356416 + 693699088996 = 558304^2 + 832886^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497014 + ... + 2062002.

It is an arithmetic number, because the mean of its divisors is an integer number (146621779045).

Almost surely, 2^{1005402445412} is an apocalyptic number.

It is an amenable number.

1005402445412 is a deficient number, since it is larger than the sum of its proper divisors (754058903128).

1005402445412 is a wasteful number, since it uses less digits than its factorization.

1005402445412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009870 (or 1009868 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

The spelling of 1005402445412 in words is "one trillion, five billion, four hundred two million, four hundred forty-five thousand, four hundred twelve".