1271115532528 has 20 divisors (see below), whose sum is σ = 2493960857440. Its totient is φ = 627512730624.

The previous prime is 1271115532517. The next prime is 1271115532549. The reversal of 1271115532528 is 8252355111721.

It is a super-4 number, since 4×1271115532528⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

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, 502813425 + ... + 502815952.

It is an arithmetic number, because the mean of its divisors is an integer number (124698042872).

Almost surely, 2^{1271115532528} is an apocalyptic number.

It is an amenable number.

1271115532528 is a deficient number, since it is larger than the sum of its proper divisors (1222845324912).

1271115532528 is a wasteful number, since it uses less digits than its factorization.

1271115532528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005629464 (or 1005629458 counting only the distinct ones).

The product of its digits is 168000, while the sum is 43.

The spelling of 1271115532528 in words is "one trillion, two hundred seventy-one billion, one hundred fifteen million, five hundred thirty-two thousand, five hundred twenty-eight".