1276389046680 has 128 divisors (see below), whose sum is σ = 4177775750400. Its totient is φ = 309390425600.

The previous prime is 1276389046651. The next prime is 1276389046711. The reversal of 1276389046680 is 866409836721.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 11840866 + ... + 11948174.

It is an arithmetic number, because the mean of its divisors is an integer number (32638873050).

Almost surely, 2^{1276389046680} is an apocalyptic number.

1276389046680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276389046680 is an abundant number, since it is smaller than the sum of its proper divisors (2901386703720).

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

1276389046680 is a wasteful number, since it uses less digits than its factorization.

1276389046680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116345 (or 116341 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 1276389046680 in words is "one trillion, two hundred seventy-six billion, three hundred eighty-nine million, forty-six thousand, six hundred eighty".