1266296758272 has 1120 divisors, whose sum is σ = 4740622626432. Its totient is φ = 327932706816.

The previous prime is 1266296758271. The next prime is 1266296758277. The reversal of 1266296758272 is 2728576926621.

1266296758272 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 296 + 75 + 8 + 272 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (60963840) is a multiple of the sum of its prime divisors (405).

It is not an unprimeable number, because it can be changed into a prime (1266296758271) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4045676388 + ... + 4045676700.

Almost surely, 2^{1266296758272} is an apocalyptic number.

1266296758272 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 1266296758272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2370311313216).

1266296758272 is an abundant number, since it is smaller than the sum of its proper divisors (3474325868160).

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

1266296758272 is an equidigital number, since it uses as much as digits as its factorization.

1266296758272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 405 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 1266296758272 in words is "one trillion, two hundred sixty-six billion, two hundred ninety-six million, seven hundred fifty-eight thousand, two hundred seventy-two".