1717979899944 has 128 divisors (see below), whose sum is σ = 5381925120000. Its totient is φ = 443963331840.

The previous prime is 1717979899891. The next prime is 1717979899967. The reversal of 1717979899944 is 4499989797171.

It is a super-2 number, since 2×1717979899944² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1995444 + ... + 2723555.

It is an arithmetic number, because the mean of its divisors is an integer number (42046290000).

Almost surely, 2^{1717979899944} is an apocalyptic number.

1717979899944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1717979899944 is an abundant number, since it is smaller than the sum of its proper divisors (3663945220056).

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

1717979899944 is a wasteful number, since it uses less digits than its factorization.

1717979899944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719223 (or 4719219 counting only the distinct ones).

The product of its digits is 2592487296, while the sum is 84.

The spelling of 1717979899944 in words is "one trillion, seven hundred seventeen billion, nine hundred seventy-nine million, eight hundred ninety-nine thousand, nine hundred forty-four".