1720727143265 has 16 divisors (see below), whose sum is σ = 2261398910400. Its totient is φ = 1249153678272.

The previous prime is 1720727143243. The next prime is 1720727143313. The reversal of 1720727143265 is 5623417270271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1720727143265 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224341295 + ... + 224348964.

It is an arithmetic number, because the mean of its divisors is an integer number (141337431900).

Almost surely, 2^{1720727143265} is an apocalyptic number.

It is an amenable number.

1720727143265 is a deficient number, since it is larger than the sum of its proper divisors (540671767135).

1720727143265 is a wasteful number, since it uses less digits than its factorization.

1720727143265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448690336.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 1720727143265 in words is "one trillion, seven hundred twenty billion, seven hundred twenty-seven million, one hundred forty-three thousand, two hundred sixty-five".