3782304078521 has 2 divisors, whose sum is σ = 3782304078522. Its totient is φ = 3782304078520.

The previous prime is 3782304078463. The next prime is 3782304078523. The reversal of 3782304078521 is 1258704032873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2114683098025 + 1667620980496 = 1454195^2 + 1291364^2 .

It is a cyclic number.

It is not a de Polignac number, because 3782304078521 - 2⁶ = 3782304078457 is a prime.

Together with 3782304078523, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3782304078521.

It is not a weakly prime, because it can be changed into another prime (3782304078523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1891152039260 + 1891152039261.

It is an arithmetic number, because the mean of its divisors is an integer number (1891152039261).

Almost surely, 2^{3782304078521} is an apocalyptic number.

It is an amenable number.

3782304078521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3782304078521 is an equidigital number, since it uses as much as digits as its factorization.

3782304078521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 3782304078521 in words is "three trillion, seven hundred eighty-two billion, three hundred four million, seventy-eight thousand, five hundred twenty-one".