1271117656744 has 32 divisors (see below), whose sum is σ = 2655186093000. Its totient is φ = 566439697152.

The previous prime is 1271117656733. The next prime is 1271117656747. The reversal of 1271117656744 is 4476567111721.

It can be written as a sum of positive squares in 4 ways, for example, as 1181051644644 + 90066012100 = 1086762^2 + 300110^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 1271117656691 and 1271117656700.

It is not an unprimeable number, because it can be changed into a prime (1271117656747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210726039 + ... + 210732070.

Almost surely, 2^{1271117656744} is an apocalyptic number.

It is an amenable number.

1271117656744 is an abundant number, since it is smaller than the sum of its proper divisors (1384068436256).

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

1271117656744 is a wasteful number, since it uses less digits than its factorization.

1271117656744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421458157 (or 421458153 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 52.

The spelling of 1271117656744 in words is "one trillion, two hundred seventy-one billion, one hundred seventeen million, six hundred fifty-six thousand, seven hundred forty-four".