1276780255168 has 112 divisors (see below), whose sum is σ = 2899039509504. Its totient is φ = 552654627840.

The previous prime is 1276780255159. The next prime is 1276780255169. The reversal of 1276780255168 is 8615520876721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276780255169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702805 + ... + 1745707.

Almost surely, 2^{1276780255168} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276780255168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1449519754752).

1276780255168 is an abundant number, since it is smaller than the sum of its proper divisors (1622259254336).

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

1276780255168 is a wasteful number, since it uses less digits than its factorization.

1276780255168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043010 (or 1043000 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 58.

The spelling of 1276780255168 in words is "one trillion, two hundred seventy-six billion, seven hundred eighty million, two hundred fifty-five thousand, one hundred sixty-eight".