55251218338 has 8 divisors (see below), whose sum is σ = 82892926188. Its totient is φ = 27620242944.

The previous prime is 55251218329. The next prime is 55251218357. The reversal of 55251218338 is 83381215255.

It can be written as a sum of positive squares in 2 ways, for example, as 53960037849 + 1291180489 = 232293^2 + 35933^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 55251218294 and 55251218303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2670231 + ... + 2690842.

Almost surely, 2^55251218338 is an apocalyptic number.

55251218338 is a deficient number, since it is larger than the sum of its proper divisors (27641707850).

55251218338 is a wasteful number, since it uses less digits than its factorization.

55251218338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5366228.

The product of its digits is 288000, while the sum is 43.

The spelling of 55251218338 in words is "fifty-five billion, two hundred fifty-one million, two hundred eighteen thousand, three hundred thirty-eight".