1276811673612 has 48 divisors (see below), whose sum is σ = 3168251019360. Its totient is φ = 398819146752.

The previous prime is 1276811673593. The next prime is 1276811673637. The reversal of 1276811673612 is 2163761186721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13618963 + ... + 13712394.

It is an arithmetic number, because the mean of its divisors is an integer number (66005229570).

Almost surely, 2^{1276811673612} is an apocalyptic number.

1276811673612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1276811673612 is an abundant number, since it is smaller than the sum of its proper divisors (1891439345748).

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

1276811673612 is a wasteful number, since it uses less digits than its factorization.

1276811673612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27331610 (or 27331608 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The spelling of 1276811673612 in words is "one trillion, two hundred seventy-six billion, eight hundred eleven million, six hundred seventy-three thousand, six hundred twelve".