1720656582813 has 12 divisors (see below), whose sum is σ = 2840448962208. Its totient is φ = 983232333000.

The previous prime is 1720656582811. The next prime is 1720656582823. The reversal of 1720656582813 is 3182856560271.

1720656582813 is a `hidden beast` number, since 1 + 7 + 2 + 0 + 6 + 56 + 582 + 8 + 1 + 3 = 666.

It is not a de Polignac number, because 1720656582813 - 2¹ = 1720656582811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1720656582813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720656582811) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 13656004563 + ... + 13656004688.

It is an arithmetic number, because the mean of its divisors is an integer number (236704080184).

Almost surely, 2^{1720656582813} is an apocalyptic number.

It is an amenable number.

1720656582813 is a deficient number, since it is larger than the sum of its proper divisors (1119792379395).

1720656582813 is a wasteful number, since it uses less digits than its factorization.

1720656582813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312009264 (or 27312009261 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 1720656582813 in words is "one trillion, seven hundred twenty billion, six hundred fifty-six million, five hundred eighty-two thousand, eight hundred thirteen".