1726668323641 has 4 divisors (see below), whose sum is σ = 1726733060752. Its totient is φ = 1726603586532.

The previous prime is 1726668323579. The next prime is 1726668323647. The reversal of 1726668323641 is 1463238666271.

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 a de Polignac number, because none of the positive numbers 2^k-1726668323641 is a prime.

It is a super-2 number, since 2×1726668323641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1726668323647) 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, 32328531 + ... + 32381896.

It is an arithmetic number, because the mean of its divisors is an integer number (431683265188).

Almost surely, 2^{1726668323641} is an apocalyptic number.

It is an amenable number.

1726668323641 is a deficient number, since it is larger than the sum of its proper divisors (64737111).

1726668323641 is an equidigital number, since it uses as much as digits as its factorization.

1726668323641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64737110.

The product of its digits is 10450944, while the sum is 55.

The spelling of 1726668323641 in words is "one trillion, seven hundred twenty-six billion, six hundred sixty-eight million, three hundred twenty-three thousand, six hundred forty-one".