1276639121104 has 10 divisors (see below), whose sum is σ = 2473488297170. Its totient is φ = 638319560544.

The previous prime is 1276639121083. The next prime is 1276639121117. The reversal of 1276639121104 is 4011219366721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1146355662400 + 130283458704 = 1070680^2 + 360948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39894972519 + ... + 39894972550.

It is an arithmetic number, because the mean of its divisors is an integer number (247348829717).

Almost surely, 2^{1276639121104} is an apocalyptic number.

It is an amenable number.

1276639121104 is a deficient number, since it is larger than the sum of its proper divisors (1196849176066).

1276639121104 is an equidigital number, since it uses as much as digits as its factorization.

1276639121104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79789945077 (or 79789945071 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 1276639121104 in words is "one trillion, two hundred seventy-six billion, six hundred thirty-nine million, one hundred twenty-one thousand, one hundred four".