1272744553565 has 16 divisors (see below), whose sum is σ = 1538213214720. Its totient is φ = 1010933991360.

The previous prime is 1272744553469. The next prime is 1272744553579. The reversal of 1272744553565 is 5653554472721.

It is not a de Polignac number, because 1272744553565 - 2³⁶ = 1204025076829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1272744553565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575789 + ... + 1696178.

It is an arithmetic number, because the mean of its divisors is an integer number (96138325920).

Almost surely, 2^{1272744553565} is an apocalyptic number.

It is an amenable number.

1272744553565 is a deficient number, since it is larger than the sum of its proper divisors (265468661155).

1272744553565 is a wasteful number, since it uses less digits than its factorization.

1272744553565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272772.

The product of its digits is 35280000, while the sum is 56.

The spelling of 1272744553565 in words is "one trillion, two hundred seventy-two billion, seven hundred forty-four million, five hundred fifty-three thousand, five hundred sixty-five".