5649860408021 has 2 divisors, whose sum is σ = 5649860408022. Its totient is φ = 5649860408020.

The previous prime is 5649860407979. The next prime is 5649860408057. The reversal of 5649860408021 is 1208040689465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5511160027396 + 138700380625 = 2347586^2 + 372425^2 .

It is a cyclic number.

It is not a de Polignac number, because 5649860408021 - 2²² = 5649856213717 is a prime.

It is a super-3 number, since 3×5649860408021³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5649860108021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2824930204010 + 2824930204011.

It is an arithmetic number, because the mean of its divisors is an integer number (2824930204011).

Almost surely, 2^{5649860408021} is an apocalyptic number.

It is an amenable number.

5649860408021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5649860408021 is an equidigital number, since it uses as much as digits as its factorization.

5649860408021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 5649860408021 in words is "five trillion, six hundred forty-nine billion, eight hundred sixty million, four hundred eight thousand, twenty-one".