1268256047780 has 12 divisors (see below), whose sum is σ = 2663337700380. Its totient is φ = 507302419104.

The previous prime is 1268256047777. The next prime is 1268256047783. The reversal of 1268256047780 is 877406528621.

It is an interprime number because it is at equal distance from previous prime (1268256047777) and next prime (1268256047783).

It can be written as a sum of positive squares in 2 ways, for example, as 469463410276 + 798792637504 = 685174^2 + 893752^2 .

It is not an unprimeable number, because it can be changed into a prime (1268256047783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31706401175 + ... + 31706401214.

It is an arithmetic number, because the mean of its divisors is an integer number (221944808365).

Almost surely, 2^{1268256047780} is an apocalyptic number.

1268256047780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268256047780 is an abundant number, since it is smaller than the sum of its proper divisors (1395081652600).

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

1268256047780 is a wasteful number, since it uses less digits than its factorization.

1268256047780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63412802398 (or 63412802396 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 1268256047780 in words is "one trillion, two hundred sixty-eight billion, two hundred fifty-six million, forty-seven thousand, seven hundred eighty".