1278458052412 has 24 divisors (see below), whose sum is σ = 2317071229200. Its totient is φ = 616487630976.

The previous prime is 1278458052371. The next prime is 1278458052427. The reversal of 1278458052412 is 2142508548721.

It is a congruent number.

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, 6138337 + ... + 6343192.

It is an arithmetic number, because the mean of its divisors is an integer number (96544634550).

Almost surely, 2^{1278458052412} is an apocalyptic number.

It is an amenable number.

1278458052412 is a deficient number, since it is larger than the sum of its proper divisors (1038613176788).

1278458052412 is a wasteful number, since it uses less digits than its factorization.

1278458052412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12482445 (or 12482443 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 49.

The spelling of 1278458052412 in words is "one trillion, two hundred seventy-eight billion, four hundred fifty-eight million, fifty-two thousand, four hundred twelve".