55561222838 has 16 divisors (see below), whose sum is σ = 90968633280. Its totient is φ = 25241137800.

The previous prime is 55561222831. The next prime is 55561222919. The reversal of 55561222838 is 83822216555.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55561222792 and 55561222801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561222831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657428 + ... + 737111.

It is an arithmetic number, because the mean of its divisors is an integer number (5685539580).

Almost surely, 2^55561222838 is an apocalyptic number.

55561222838 is a deficient number, since it is larger than the sum of its proper divisors (35407410442).

55561222838 is a wasteful number, since it uses less digits than its factorization.

55561222838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396363.

The product of its digits is 1152000, while the sum is 47.

The spelling of 55561222838 in words is "fifty-five billion, five hundred sixty-one million, two hundred twenty-two thousand, eight hundred thirty-eight".