1266772854912 has 128 divisors (see below), whose sum is σ = 3421257186240. Its totient is φ = 415203790848.

The previous prime is 1266772854901. The next prime is 1266772854917. The reversal of 1266772854912 is 2194582776621.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1266772854917) 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, 14286298 + ... + 14374694.

Almost surely, 2^{1266772854912} is an apocalyptic number.

1266772854912 is a gapful number since it is divisible by the number (12) 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 1266772854912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710628593120).

1266772854912 is an abundant number, since it is smaller than the sum of its proper divisors (2154484331328).

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

1266772854912 is an equidigital number, since it uses as much as digits as its factorization.

1266772854912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89038 (or 89026 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 60.

The spelling of 1266772854912 in words is "one trillion, two hundred sixty-six billion, seven hundred seventy-two million, eight hundred fifty-four thousand, nine hundred twelve".