555421649 has 2 divisors, whose sum is σ = 555421650. Its totient is φ = 555421648.

The previous prime is 555421631. The next prime is 555421663. The reversal of 555421649 is 946124555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511438225 + 43983424 = 22615^2 + 6632^2 .

It is a cyclic number.

It is not a de Polignac number, because 555421649 - 2¹² = 555417553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (555421049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277710824 + 277710825.

It is an arithmetic number, because the mean of its divisors is an integer number (277710825).

Almost surely, 2^555421649 is an apocalyptic number.

It is an amenable number.

555421649 is a deficient number, since it is larger than the sum of its proper divisors (1).

555421649 is an equidigital number, since it uses as much as digits as its factorization.

555421649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 41.

The square root of 555421649 is about 23567.3852813586. The cubic root of 555421649 is about 822.0046377434.

The spelling of 555421649 in words is "five hundred fifty-five million, four hundred twenty-one thousand, six hundred forty-nine".