1720617106641 has 4 divisors (see below), whose sum is σ = 2294156142192. Its totient is φ = 1147078071092.

The previous prime is 1720617106627. The next prime is 1720617106661. The reversal of 1720617106641 is 1466017160271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1720617106641 - 2¹⁸ = 1720616844497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1720617106593 and 1720617106602.

It is not an unprimeable number, because it can be changed into a prime (1720617106661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286769517771 + ... + 286769517776.

It is an arithmetic number, because the mean of its divisors is an integer number (573539035548).

Almost surely, 2^{1720617106641} is an apocalyptic number.

It is an amenable number.

1720617106641 is a deficient number, since it is larger than the sum of its proper divisors (573539035551).

1720617106641 is an equidigital number, since it uses as much as digits as its factorization.

1720617106641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573539035550.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 1720617106641 in words is "one trillion, seven hundred twenty billion, six hundred seventeen million, one hundred six thousand, six hundred forty-one".