1266383828892 has 384 divisors, whose sum is σ = 3870155161600. Its totient is φ = 312963969024.

The previous prime is 1266383828881. The next prime is 1266383828921. The reversal of 1266383828892 is 2988283836621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 971897913 + ... + 971899215.

Almost surely, 2^{1266383828892} is an apocalyptic number.

1266383828892 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 1266383828892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935077580800).

1266383828892 is an abundant number, since it is smaller than the sum of its proper divisors (2603771332708).

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

1266383828892 is a wasteful number, since it uses less digits than its factorization.

1266383828892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825 (or 1823 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 66.

The spelling of 1266383828892 in words is "one trillion, two hundred sixty-six billion, three hundred eighty-three million, eight hundred twenty-eight thousand, eight hundred ninety-two".