1271357340655 has 32 divisors (see below), whose sum is σ = 1611840384000. Its totient is φ = 960012398592.

The previous prime is 1271357340641. The next prime is 1271357340661. The reversal of 1271357340655 is 5560437531721.

It is a cyclic number.

It is not a de Polignac number, because 1271357340655 - 2¹¹ = 1271357338607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1271357340599 and 1271357340608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28601007 + ... + 28645423.

It is an arithmetic number, because the mean of its divisors is an integer number (50370012000).

Almost surely, 2^{1271357340655} is an apocalyptic number.

1271357340655 is a deficient number, since it is larger than the sum of its proper divisors (340483043345).

1271357340655 is a wasteful number, since it uses less digits than its factorization.

1271357340655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45543.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 1271357340655 in words is "one trillion, two hundred seventy-one billion, three hundred fifty-seven million, three hundred forty thousand, six hundred fifty-five".