1272216564544 has 56 divisors (see below), whose sum is σ = 2528106508928. Its totient is φ = 635213975040.

The previous prime is 1272216564467. The next prime is 1272216564547. The reversal of 1272216564544 is 4454656122721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272216564547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261716674 + ... + 261721534.

It is an arithmetic number, because the mean of its divisors is an integer number (45144759088).

Almost surely, 2^{1272216564544} is an apocalyptic number.

It is an amenable number.

1272216564544 is a deficient number, since it is larger than the sum of its proper divisors (1255889944384).

1272216564544 is a wasteful number, since it uses less digits than its factorization.

1272216564544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9783 (or 9773 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 49.

The spelling of 1272216564544 in words is "one trillion, two hundred seventy-two billion, two hundred sixteen million, five hundred sixty-four thousand, five hundred forty-four".