3818220745441 has 2 divisors, whose sum is σ = 3818220745442. Its totient is φ = 3818220745440.

The previous prime is 3818220745411. The next prime is 3818220745459. The reversal of 3818220745441 is 1445470228183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3514421353041 + 303799392400 = 1874679^2 + 551180^2 .

It is a cyclic number.

It is not a de Polignac number, because 3818220745441 - 2²⁷ = 3818086527713 is a prime.

It is not a weakly prime, because it can be changed into another prime (3818220745411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1909110372720 + 1909110372721.

It is an arithmetic number, because the mean of its divisors is an integer number (1909110372721).

Almost surely, 2^{3818220745441} is an apocalyptic number.

It is an amenable number.

3818220745441 is a deficient number, since it is larger than the sum of its proper divisors (1).

3818220745441 is an equidigital number, since it uses as much as digits as its factorization.

3818220745441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 3818220745441 in words is "three trillion, eight hundred eighteen billion, two hundred twenty million, seven hundred forty-five thousand, four hundred forty-one".