1316781059328 has 252 divisors, whose sum is σ = 4503804362848. Its totient is φ = 376222786560.

The previous prime is 1316781059317. The next prime is 1316781059393. The reversal of 1316781059328 is 8239501876131.

1316781059328 is a `hidden beast` number, since 1 + 3 + 16 + 7 + 8 + 10 + 593 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 802383 + ... + 1810353.

Almost surely, 2^{1316781059328} is an apocalyptic number.

1316781059328 is a gapful number since it is divisible by the number (18) 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 1316781059328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2251902181424).

1316781059328 is an abundant number, since it is smaller than the sum of its proper divisors (3187023303520).

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

1316781059328 is an frugal number, since it uses more digits than its factorization.

1316781059328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008012 (or 1007983 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1316781059328 in words is "one trillion, three hundred sixteen billion, seven hundred eighty-one million, fifty-nine thousand, three hundred twenty-eight".