55016638 has 8 divisors (see below), whose sum is σ = 82566288. Its totient is φ = 27494544.

The previous prime is 55016623. The next prime is 55016639. The reversal of 55016638 is 83661055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55016639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831 + ... + 10522.

It is an arithmetic number, because the mean of its divisors is an integer number (10320786).

Almost surely, 2^55016638 is an apocalyptic number.

55016638 is a deficient number, since it is larger than the sum of its proper divisors (27549650).

55016638 is a wasteful number, since it uses less digits than its factorization.

55016638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13778.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 55016638 is about 7417.3201360060. The cubic root of 55016638 is about 380.3335897997. Note that the first 3 decimals are identical.

The spelling of 55016638 in words is "fifty-five million, sixteen thousand, six hundred thirty-eight".