1720063421707 has 8 divisors (see below), whose sum is σ = 1780417184400. Its totient is φ = 1659779074464.

The previous prime is 1720063421701. The next prime is 1720063421737. The reversal of 1720063421707 is 7071243600271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1720063421707 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 1720063421707.

It is not an unprimeable number, because it can be changed into a prime (1720063421701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17303433 + ... + 17402554.

It is an arithmetic number, because the mean of its divisors is an integer number (222552148050).

Almost surely, 2^{1720063421707} is an apocalyptic number.

1720063421707 is a deficient number, since it is larger than the sum of its proper divisors (60353762693).

1720063421707 is a wasteful number, since it uses less digits than its factorization.

1720063421707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34707725.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 1720063421707 in words is "one trillion, seven hundred twenty billion, sixty-three million, four hundred twenty-one thousand, seven hundred seven".