1260917856000 has 864 divisors, whose sum is σ = 4965324698880. Its totient is φ = 304708608000.

The previous prime is 1260917855993. The next prime is 1260917856049. The reversal of 1260917856000 is 6587190621.

1260917856000 is a `hidden beast` number, since 1 + 26 + 0 + 9 + 17 + 8 + 5 + 600 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1960991679 + ... + 1960992321.

Almost surely, 2^{1260917856000} is an apocalyptic number.

1260917856000 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 1260917856000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482662349440).

1260917856000 is an abundant number, since it is smaller than the sum of its proper divisors (3704406842880).

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

1260917856000 is a wasteful number, since it uses less digits than its factorization.

1260917856000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 1260917856000 in words is "one trillion, two hundred sixty billion, nine hundred seventeen million, eight hundred fifty-six thousand".