1266965731152 has 240 divisors, whose sum is σ = 4002991649280. Its totient is φ = 370548864000.

The previous prime is 1266965731117. The next prime is 1266965731217. The reversal of 1266965731152 is 2511375696621.

1266965731152 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 9 + 6 + 573 + 11 + 52 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 234316833 + ... + 234322239.

It is an arithmetic number, because the mean of its divisors is an integer number (16679131872).

Almost surely, 2^{1266965731152} is an apocalyptic number.

1266965731152 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 1266965731152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2001495824640).

1266965731152 is an abundant number, since it is smaller than the sum of its proper divisors (2736025918128).

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

1266965731152 is a wasteful number, since it uses less digits than its factorization.

1266965731152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10562 (or 10553 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 1266965731152 in words is "one trillion, two hundred sixty-six billion, nine hundred sixty-five million, seven hundred thirty-one thousand, one hundred fifty-two".