1317000356720 has 160 divisors (see below), whose sum is σ = 3169818368640. Its totient is φ = 508539617280.

The previous prime is 1317000356699. The next prime is 1317000356753. The reversal of 1317000356720 is 276530007131.

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 31 ways as a sum of consecutive naturals, for example, 317118164 + ... + 317122316.

It is an arithmetic number, because the mean of its divisors is an integer number (19811364804).

Almost surely, 2^{1317000356720} is an apocalyptic number.

1317000356720 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 1317000356720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584909184320).

1317000356720 is an abundant number, since it is smaller than the sum of its proper divisors (1852818011920).

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

1317000356720 is a wasteful number, since it uses less digits than its factorization.

1317000356720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5203 (or 5197 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 1317000356720 in words is "one trillion, three hundred seventeen billion, three hundred fifty-six thousand, seven hundred twenty".