1346537441721 has 4 divisors (see below), whose sum is σ = 1795383255632. Its totient is φ = 897691627812.

The previous prime is 1346537441663. The next prime is 1346537441731. The reversal of 1346537441721 is 1271447356431.

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 de Polignac number, because none of the positive numbers 2^k-1346537441721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1346537441731) 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, 224422906951 + ... + 224422906956.

It is an arithmetic number, because the mean of its divisors is an integer number (448845813908).

Almost surely, 2^{1346537441721} is an apocalyptic number.

It is an amenable number.

1346537441721 is a deficient number, since it is larger than the sum of its proper divisors (448845813911).

1346537441721 is an equidigital number, since it uses as much as digits as its factorization.

1346537441721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448845813910.

The product of its digits is 1693440, while the sum is 48.

The spelling of 1346537441721 in words is "one trillion, three hundred forty-six billion, five hundred thirty-seven million, four hundred forty-one thousand, seven hundred twenty-one".