1276718540818 has 16 divisors (see below), whose sum is σ = 2225756295360. Its totient is φ = 537891104016.

The previous prime is 1276718540813. The next prime is 1276718540827. The reversal of 1276718540818 is 8180458176721.

It is not an unprimeable number, because it can be changed into a prime (1276718540813) 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, 772831221 + ... + 772832872.

It is an arithmetic number, because the mean of its divisors is an integer number (139109768460).

Almost surely, 2^{1276718540818} is an apocalyptic number.

1276718540818 is a deficient number, since it is larger than the sum of its proper divisors (949037754542).

1276718540818 is a wasteful number, since it uses less digits than its factorization.

1276718540818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545664161.

The product of its (nonzero) digits is 6021120, while the sum is 58.

The spelling of 1276718540818 in words is "one trillion, two hundred seventy-six billion, seven hundred eighteen million, five hundred forty thousand, eight hundred eighteen".