1271353871064 has 64 divisors (see below), whose sum is σ = 3293241753600. Its totient is φ = 408741397376.

The previous prime is 1271353871017. The next prime is 1271353871071. The reversal of 1271353871064 is 4601783531721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8395224 + ... + 8545319.

It is an arithmetic number, because the mean of its divisors is an integer number (51456902400).

Almost surely, 2^{1271353871064} is an apocalyptic number.

It is an amenable number.

1271353871064 is an abundant number, since it is smaller than the sum of its proper divisors (2021887882536).

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

1271353871064 is a wasteful number, since it uses less digits than its factorization.

1271353871064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16940664 (or 16940660 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 1271353871064 in words is "one trillion, two hundred seventy-one billion, three hundred fifty-three million, eight hundred seventy-one thousand, sixty-four".