3621660821453 has 2 divisors, whose sum is σ = 3621660821454. Its totient is φ = 3621660821452.

The previous prime is 3621660821413. The next prime is 3621660821533. The reversal of 3621660821453 is 3541280661263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3033160110409 + 588500711044 = 1741597^2 + 767138^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621660821453 - 2²⁴ = 3621644044237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3621660821398 and 3621660821407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3621660821413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810830410726 + 1810830410727.

It is an arithmetic number, because the mean of its divisors is an integer number (1810830410727).

Almost surely, 2^{3621660821453} is an apocalyptic number.

It is an amenable number.

3621660821453 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621660821453 is an equidigital number, since it uses as much as digits as its factorization.

3621660821453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 3621660821453 in words is "three trillion, six hundred twenty-one billion, six hundred sixty million, eight hundred twenty-one thousand, four hundred fifty-three".