55661629 has 2 divisors, whose sum is σ = 55661630. Its totient is φ = 55661628.

The previous prime is 55661611. The next prime is 55661699. The reversal of 55661629 is 92616655.

55661629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54730404 + 931225 = 7398^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 55661629 - 2⁵ = 55661597 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55661591 and 55661600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55661609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830814 + 27830815.

It is an arithmetic number, because the mean of its divisors is an integer number (27830815).

Almost surely, 2^55661629 is an apocalyptic number.

It is an amenable number.

55661629 is a deficient number, since it is larger than the sum of its proper divisors (1).

55661629 is an equidigital number, since it uses as much as digits as its factorization.

55661629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 55661629 is about 7460.6721547056. The cubic root of 55661629 is about 381.8141073553.

The spelling of 55661629 in words is "fifty-five million, six hundred sixty-one thousand, six hundred twenty-nine".