1305999104256 has 1296 divisors, whose sum is σ = 5029381925568. Its totient is φ = 321889075200.

The previous prime is 1305999104237. The next prime is 1305999104281. The reversal of 1305999104256 is 6524019995031.

1305999104256 is a `hidden beast` number, since 1 + 3 + 0 + 599 + 9 + 1 + 0 + 42 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1975792566 + ... + 1975793226.

Almost surely, 2^{1305999104256} is an apocalyptic number.

1305999104256 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 1305999104256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2514690962784).

1305999104256 is an abundant number, since it is smaller than the sum of its proper divisors (3723382821312).

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

1305999104256 is a wasteful number, since it uses less digits than its factorization.

1305999104256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 1305999104256 in words is "one trillion, three hundred five billion, nine hundred ninety-nine million, one hundred four thousand, two hundred fifty-six".