1716123421000 has 128 divisors (see below), whose sum is σ = 4149812684160. Its totient is φ = 663845280000.

The previous prime is 1716123420983. The next prime is 1716123421003. The reversal of 1716123421000 is 1243216171.

It is a super-2 number, since 2×1716123421000² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1716123421000.

It is not an unprimeable number, because it can be changed into a prime (1716123421003) by changing a digit.

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, 4145427 + ... + 4540573.

It is an arithmetic number, because the mean of its divisors is an integer number (32420411595).

Almost surely, 2^{1716123421000} is an apocalyptic number.

1716123421000 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 1716123421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074906342080).

1716123421000 is an abundant number, since it is smaller than the sum of its proper divisors (2433689263160).

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

1716123421000 is a wasteful number, since it uses less digits than its factorization.

1716123421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395312 (or 395298 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 1716123421000 its reverse (1243216171), we get a palindrome (1717366637171).

The spelling of 1716123421000 in words is "one trillion, seven hundred sixteen billion, one hundred twenty-three million, four hundred twenty-one thousand".