1720447352143 has 24 divisors (see below), whose sum is σ = 1868161809840. Its totient is φ = 1583682347520.

The previous prime is 1720447352083. The next prime is 1720447352213. The reversal of 1720447352143 is 3412537440271.

It is not a de Polignac number, because 1720447352143 - 2³³ = 1711857417551 is a prime.

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 1720447352143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720447352443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304016848 + ... + 304022506.

It is an arithmetic number, because the mean of its divisors is an integer number (77840075410).

Almost surely, 2^{1720447352143} is an apocalyptic number.

1720447352143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1720447352143 is a deficient number, since it is larger than the sum of its proper divisors (147714457697).

1720447352143 is a wasteful number, since it uses less digits than its factorization.

1720447352143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379 (or 10366 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 1720447352143 in words is "one trillion, seven hundred twenty billion, four hundred forty-seven million, three hundred fifty-two thousand, one hundred forty-three".