1712721647641 has 4 divisors (see below), whose sum is σ = 1712724476212. Its totient is φ = 1712718819072.

The previous prime is 1712721647629. The next prime is 1712721647759. The reversal of 1712721647641 is 1467461272171.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 849169622016 + 863552025625 = 921504^2 + 929275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1712721647641 - 2⁷ = 1712721647513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1712721645641) 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, 97116 + ... + 1853341.

It is an arithmetic number, because the mean of its divisors is an integer number (428181119053).

Almost surely, 2^{1712721647641} is an apocalyptic number.

It is an amenable number.

1712721647641 is a deficient number, since it is larger than the sum of its proper divisors (2828571).

1712721647641 is an equidigital number, since it uses as much as digits as its factorization.

1712721647641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828570.

The product of its digits is 790272, while the sum is 49.

The spelling of 1712721647641 in words is "one trillion, seven hundred twelve billion, seven hundred twenty-one million, six hundred forty-seven thousand, six hundred forty-one".