1276649288256 has 112 divisors (see below), whose sum is σ = 3409013044800. Its totient is φ = 421620498432.

The previous prime is 1276649288251. The next prime is 1276649288273. The reversal of 1276649288256 is 6528829466721.

It is not an unprimeable number, because it can be changed into a prime (1276649288251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64405515 + ... + 64425333.

Almost surely, 2^{1276649288256} is an apocalyptic number.

1276649288256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276649288256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1704506522400).

1276649288256 is an abundant number, since it is smaller than the sum of its proper divisors (2132363756544).

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

1276649288256 is a wasteful number, since it uses less digits than its factorization.

1276649288256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22916 (or 22906 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 66.

The spelling of 1276649288256 in words is "one trillion, two hundred seventy-six billion, six hundred forty-nine million, two hundred eighty-eight thousand, two hundred fifty-six".