55664963 has 4 divisors (see below), whose sum is σ = 55688208. Its totient is φ = 55641720.

The previous prime is 55664929. The next prime is 55664969. The reversal of 55664963 is 36946655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36946655 = 5 ⋅7389331.

It is a cyclic number.

It is not a de Polignac number, because 55664963 - 2²⁴ = 38887747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55664969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7556 + ... + 12977.

It is an arithmetic number, because the mean of its divisors is an integer number (13922052).

Almost surely, 2^55664963 is an apocalyptic number.

55664963 is a deficient number, since it is larger than the sum of its proper divisors (23245).

55664963 is a wasteful number, since it uses less digits than its factorization.

55664963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23244.

The product of its digits is 583200, while the sum is 44.

The square root of 55664963 is about 7460.8955896729. The cubic root of 55664963 is about 381.8217304573.

The spelling of 55664963 in words is "fifty-five million, six hundred sixty-four thousand, nine hundred sixty-three".