55729663 has 4 divisors (see below), whose sum is σ = 60796008. Its totient is φ = 50663320.

The previous prime is 55729651. The next prime is 55729673. The reversal of 55729663 is 36692755.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55729663 - 2⁹ = 55729151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55729613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2533156 + ... + 2533177.

It is an arithmetic number, because the mean of its divisors is an integer number (15199002).

Almost surely, 2^55729663 is an apocalyptic number.

55729663 is a deficient number, since it is larger than the sum of its proper divisors (5066345).

55729663 is a wasteful number, since it uses less digits than its factorization.

55729663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066344.

The product of its digits is 340200, while the sum is 43.

The square root of 55729663 is about 7465.2302710633. The cubic root of 55729663 is about 381.9696050485.

The spelling of 55729663 in words is "fifty-five million, seven hundred twenty-nine thousand, six hundred sixty-three".