1720661260143 has 16 divisors (see below), whose sum is σ = 2622023640576. Its totient is φ = 983211146400.

The previous prime is 1720661260141. The next prime is 1720661260159. The reversal of 1720661260143 is 3410621660271.

It is a happy number.

It is not a de Polignac number, because 1720661260143 - 2¹ = 1720661260141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720661260141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88971 + ... + 1857212.

It is an arithmetic number, because the mean of its divisors is an integer number (163876477536).

Almost surely, 2^{1720661260143} is an apocalyptic number.

1720661260143 is a deficient number, since it is larger than the sum of its proper divisors (901362380433).

1720661260143 is a wasteful number, since it uses less digits than its factorization.

1720661260143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988294.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 1720661260143 in words is "one trillion, seven hundred twenty billion, six hundred sixty-one million, two hundred sixty thousand, one hundred forty-three".