1829530643621 has 2 divisors, whose sum is σ = 1829530643622. Its totient is φ = 1829530643620.

The previous prime is 1829530643569. The next prime is 1829530643623. The reversal of 1829530643621 is 1263460359281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1654860979396 + 174669664225 = 1286414^2 + 417935^2 .

It is an emirp because it is prime and its reverse (1263460359281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1829530643621 is a prime.

Together with 1829530643623, 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 1829530643621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1829530643623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914765321810 + 914765321811.

It is an arithmetic number, because the mean of its divisors is an integer number (914765321811).

Almost surely, 2^{1829530643621} is an apocalyptic number.

It is an amenable number.

1829530643621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1829530643621 is an equidigital number, since it uses as much as digits as its factorization.

1829530643621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 1829530643621 in words is "one trillion, eight hundred twenty-nine billion, five hundred thirty million, six hundred forty-three thousand, six hundred twenty-one".