1718416861456 has 15 divisors (see below), whose sum is σ = 3329442828453. Its totient is φ = 859205808960.

The previous prime is 1718416861439. The next prime is 1718416861489. The reversal of 1718416861456 is 6541686148171.

The square root of 1718416861456 is 1310884.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10063299856 + 1708353561600 = 100316^2 + 1307040^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1718416861456.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5079676 + ... + 5407396.

Almost surely, 2^{1718416861456} is an apocalyptic number.

1718416861456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1718416861456 is the 1310884-th square number.

It is an amenable number.

1718416861456 is a deficient number, since it is larger than the sum of its proper divisors (1611025966997).

1718416861456 is an frugal number, since it uses more digits than its factorization.

1718416861456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655450 (or 327723 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 58.

The spelling of 1718416861456 in words is "one trillion, seven hundred eighteen billion, four hundred sixteen million, eight hundred sixty-one thousand, four hundred fifty-six".