1272105565216 has 24 divisors (see below), whose sum is σ = 2504615631084. Its totient is φ = 636012706560.

The previous prime is 1272105565187. The next prime is 1272105565229. The reversal of 1272105565216 is 6125655012721.

It can be written as a sum of positive squares in 2 ways, for example, as 1121048969616 + 151056595600 = 1058796^2 + 388660^2 .

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, 733255 + ... + 1755526.

Almost surely, 2^{1272105565216} is an apocalyptic number.

1272105565216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272105565216 is a deficient number, since it is larger than the sum of its proper divisors (1232510065868).

1272105565216 is a wasteful number, since it uses less digits than its factorization.

1272105565216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504764 (or 2504756 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 1272105565216 in words is "one trillion, two hundred seventy-two billion, one hundred five million, five hundred sixty-five thousand, two hundred sixteen".