1278711942755 has 16 divisors (see below), whose sum is σ = 1672398796320. Its totient is φ = 932902722048.

The previous prime is 1278711942751. The next prime is 1278711942841. The reversal of 1278711942755 is 5572491178721.

It is a cyclic number.

It is not a de Polignac number, because 1278711942755 - 2² = 1278711942751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278711942694 and 1278711942703.

It is not an unprimeable number, because it can be changed into a prime (1278711942751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118503590 + ... + 118514379.

It is an arithmetic number, because the mean of its divisors is an integer number (104524924770).

Almost surely, 2^{1278711942755} is an apocalyptic number.

1278711942755 is a deficient number, since it is larger than the sum of its proper divisors (393686853565).

1278711942755 is a wasteful number, since it uses less digits than its factorization.

1278711942755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237018070.

The product of its digits is 9878400, while the sum is 59.

The spelling of 1278711942755 in words is "one trillion, two hundred seventy-eight billion, seven hundred eleven million, nine hundred forty-two thousand, seven hundred fifty-five".