1266387903360 has 640 divisors, whose sum is σ = 4798089743040. Its totient is φ = 317204398080.

The previous prime is 1266387903307. The next prime is 1266387903379. The reversal of 1266387903360 is 633097836621.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1266387903297 and 1266387903306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 570187050 + ... + 570189270.

Almost surely, 2^{1266387903360} is an apocalyptic number.

1266387903360 is a gapful number since it is divisible by the number (10) 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 1266387903360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2399044871520).

1266387903360 is an abundant number, since it is smaller than the sum of its proper divisors (3531701839680).

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

1266387903360 is a wasteful number, since it uses less digits than its factorization.

1266387903360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 1266387903360 in words is "one trillion, two hundred sixty-six billion, three hundred eighty-seven million, nine hundred three thousand, three hundred sixty".