1718716849920 has 648 divisors, whose sum is σ = 6995380326480. Its totient is φ = 388424171520.

The previous prime is 1718716849897. The next prime is 1718716849921. The reversal of 1718716849920 is 299486178171.

1718716849920 is a `hidden beast` number, since 1 + 7 + 1 + 87 + 1 + 68 + 499 + 2 + 0 = 666.

It is a super-2 number, since 2×1718716849920² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1718716849921) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 50221615 + ... + 50255825.

It is an arithmetic number, because the mean of its divisors is an integer number (10795340010).

Almost surely, 2^{1718716849920} is an apocalyptic number.

1718716849920 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 1718716849920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3497690163240).

1718716849920 is an abundant number, since it is smaller than the sum of its proper divisors (5276663476560).

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

1718716849920 is a wasteful number, since it uses less digits than its factorization.

1718716849920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34341 (or 34317 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The spelling of 1718716849920 in words is "one trillion, seven hundred eighteen billion, seven hundred sixteen million, eight hundred forty-nine thousand, nine hundred twenty".