55630643 has 2 divisors, whose sum is σ = 55630644. Its totient is φ = 55630642.

The previous prime is 55630637. The next prime is 55630717. The reversal of 55630643 is 34603655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55630643 - 2⁸ = 55630387 is a prime.

It is not a weakly prime, because it can be changed into another prime (55630243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27815321 + 27815322.

It is an arithmetic number, because the mean of its divisors is an integer number (27815322).

Almost surely, 2^55630643 is an apocalyptic number.

55630643 is a deficient number, since it is larger than the sum of its proper divisors (1).

55630643 is an equidigital number, since it uses as much as digits as its factorization.

55630643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 55630643 is about 7458.5952430736. The cubic root of 55630643 is about 381.7432441282.

The spelling of 55630643 in words is "fifty-five million, six hundred thirty thousand, six hundred forty-three".