3641036280821 has 2 divisors, whose sum is σ = 3641036280822. Its totient is φ = 3641036280820.

The previous prime is 3641036280799. The next prime is 3641036280851. The reversal of 3641036280821 is 1280826301463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2453339546596 + 1187696734225 = 1566314^2 + 1089815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3641036280821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3641036280851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820518140410 + 1820518140411.

It is an arithmetic number, because the mean of its divisors is an integer number (1820518140411).

Almost surely, 2^{3641036280821} is an apocalyptic number.

It is an amenable number.

3641036280821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3641036280821 is an equidigital number, since it uses as much as digits as its factorization.

3641036280821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 3641036280821 in words is "three trillion, six hundred forty-one billion, thirty-six million, two hundred eighty thousand, eight hundred twenty-one".