2404369661621 has 2 divisors, whose sum is σ = 2404369661622. Its totient is φ = 2404369661620.

The previous prime is 2404369661609. The next prime is 2404369661623. The reversal of 2404369661621 is 1261669634042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1830433114225 + 573936547396 = 1352935^2 + 757586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2404369661621 - 2¹⁰ = 2404369660597 is a prime.

Together with 2404369661623, 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 2404369661621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2404369661623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202184830810 + 1202184830811.

It is an arithmetic number, because the mean of its divisors is an integer number (1202184830811).

Almost surely, 2^{2404369661621} is an apocalyptic number.

It is an amenable number.

2404369661621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2404369661621 is an equidigital number, since it uses as much as digits as its factorization.

2404369661621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 2404369661621 in words is "two trillion, four hundred four billion, three hundred sixty-nine million, six hundred sixty-one thousand, six hundred twenty-one".