1721424116115 has 128 divisors (see below), whose sum is σ = 3393048268800. Its totient is φ = 821074475520.

The previous prime is 1721424116039. The next prime is 1721424116117. The reversal of 1721424116115 is 5116114241271.

1721424116115 is a `hidden beast` number, since 1 + 7 + 2 + 1 + 4 + 24 + 11 + 611 + 5 = 666.

It is not a de Polignac number, because 1721424116115 - 2¹⁰ = 1721424115091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1721424116115.

It is not an unprimeable number, because it can be changed into a prime (1721424116117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32469769 + ... + 32522741.

It is an arithmetic number, because the mean of its divisors is an integer number (26508189600).

Almost surely, 2^{1721424116115} is an apocalyptic number.

1721424116115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1721424116115 is a deficient number, since it is larger than the sum of its proper divisors (1671624152685).

1721424116115 is a wasteful number, since it uses less digits than its factorization.

1721424116115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53354 (or 53348 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

Adding to 1721424116115 its reverse (5116114241271), we get a palindrome (6837538357386).

The spelling of 1721424116115 in words is "one trillion, seven hundred twenty-one billion, four hundred twenty-four million, one hundred sixteen thousand, one hundred fifteen".