3243518910781 has 2 divisors, whose sum is σ = 3243518910782. Its totient is φ = 3243518910780.

The previous prime is 3243518910769. The next prime is 3243518910823. The reversal of 3243518910781 is 1870198153423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2745181745881 + 498337164900 = 1656859^2 + 705930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3243518910781 is a prime.

It is a super-2 number, since 2×3243518910781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3243518910581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621759455390 + 1621759455391.

It is an arithmetic number, because the mean of its divisors is an integer number (1621759455391).

Almost surely, 2^{3243518910781} is an apocalyptic number.

It is an amenable number.

3243518910781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3243518910781 is an equidigital number, since it uses as much as digits as its factorization.

3243518910781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 3243518910781 in words is "three trillion, two hundred forty-three billion, five hundred eighteen million, nine hundred ten thousand, seven hundred eighty-one".