5657446621 has 2 divisors, whose sum is σ = 5657446622. Its totient is φ = 5657446620.

The previous prime is 5657446601. The next prime is 5657446673. The reversal of 5657446621 is 1266447565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5503562596 + 153884025 = 74186^2 + 12405^2 .

It is a cyclic number.

It is not a de Polignac number, because 5657446621 - 2⁷ = 5657446493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5657446601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828723310 + 2828723311.

It is an arithmetic number, because the mean of its divisors is an integer number (2828723311).

Almost surely, 2^5657446621 is an apocalyptic number.

It is an amenable number.

5657446621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5657446621 is an equidigital number, since it uses as much as digits as its factorization.

5657446621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 46.

The square root of 5657446621 is about 75215.9997673367. Note that the first 3 decimals coincide. The cubic root of 5657446621 is about 1781.8596292208.

The spelling of 5657446621 in words is "five billion, six hundred fifty-seven million, four hundred forty-six thousand, six hundred twenty-one".