55115779238 has 32 divisors (see below), whose sum is σ = 90960057216. Its totient is φ = 24887904768.

The previous prime is 55115779223. The next prime is 55115779241. The reversal of 55115779238 is 83297751155.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 55115779238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4384370 + ... + 4396922.

It is an arithmetic number, because the mean of its divisors is an integer number (2842501788).

Almost surely, 2^55115779238 is an apocalyptic number.

55115779238 is a deficient number, since it is larger than the sum of its proper divisors (35844277978).

55115779238 is a wasteful number, since it uses less digits than its factorization.

55115779238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16208.

The product of its digits is 2646000, while the sum is 53.

The spelling of 55115779238 in words is "fifty-five billion, one hundred fifteen million, seven hundred seventy-nine thousand, two hundred thirty-eight".