55663729 has 16 divisors (see below), whose sum is σ = 64665216. Its totient is φ = 47353600.

The previous prime is 55663681. The next prime is 55663733. The reversal of 55663729 is 92736655.

55663729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55663729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55663229) 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 in 15 ways as a sum of consecutive naturals, for example, 36084 + ... + 37594.

It is an arithmetic number, because the mean of its divisors is an integer number (4041576).

Almost surely, 2^55663729 is an apocalyptic number.

It is an amenable number.

55663729 is a deficient number, since it is larger than the sum of its proper divisors (9001487).

55663729 is a wasteful number, since it uses less digits than its factorization.

55663729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736.

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

The square root of 55663729 is about 7460.8128913678. The cubic root of 55663729 is about 381.8189089847.

The spelling of 55663729 in words is "fifty-five million, six hundred sixty-three thousand, seven hundred twenty-nine".