1271611783312 has 40 divisors (see below), whose sum is σ = 2809341425016. Its totient is φ = 552374347776.

The previous prime is 1271611783271. The next prime is 1271611783313. The reversal of 1271611783312 is 2133871161721.

It can be written as a sum of positive squares in 4 ways, for example, as 143971678096 + 1127640105216 = 379436^2 + 1061904^2 .

It is not an unprimeable number, because it can be changed into a prime (1271611783313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179805823 + ... + 179812894.

Almost surely, 2^{1271611783312} is an apocalyptic number.

It is an amenable number.

1271611783312 is an abundant number, since it is smaller than the sum of its proper divisors (1537729641704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271611783312 is a wasteful number, since it uses less digits than its factorization.

1271611783312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359618755 (or 359618749 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The spelling of 1271611783312 in words is "one trillion, two hundred seventy-one billion, six hundred eleven million, seven hundred eighty-three thousand, three hundred twelve".