1266285039376 has 120 divisors (see below), whose sum is σ = 2946886458624. Its totient is φ = 525038411520.

The previous prime is 1266285039317. The next prime is 1266285039377. The reversal of 1266285039376 is 6739305826621.

It is a self number, because there is not a number n which added to its sum of digits gives 1266285039376.

It is not an unprimeable number, because it can be changed into a prime (1266285039377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141274671 + ... + 141283633.

Almost surely, 2^{1266285039376} is an apocalyptic number.

1266285039376 is a gapful number since it is divisible by the number (16) 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 1266285039376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473443229312).

1266285039376 is an abundant number, since it is smaller than the sum of its proper divisors (1680601419248).

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

1266285039376 is a wasteful number, since it uses less digits than its factorization.

1266285039376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14829 (or 14816 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 1266285039376 in words is "one trillion, two hundred sixty-six billion, two hundred eighty-five million, thirty-nine thousand, three hundred seventy-six".