1271771045440 has 112 divisors (see below), whose sum is σ = 3611513947392. Its totient is φ = 417077692416.

The previous prime is 1271771045393. The next prime is 1271771045471. The reversal of 1271771045440 is 445401771721.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12290979 + ... + 12394018.

Almost surely, 2^{1271771045440} is an apocalyptic number.

1271771045440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271771045440 is an abundant number, since it is smaller than the sum of its proper divisors (2339742901952).

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

1271771045440 is a wasteful number, since it uses less digits than its factorization.

1271771045440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24685044 (or 24685034 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 43.

The spelling of 1271771045440 in words is "one trillion, two hundred seventy-one billion, seven hundred seventy-one million, forty-five thousand, four hundred forty".