55828435866 has 72 divisors (see below), whose sum is σ = 134212291200. Its totient is φ = 15436355760.

The previous prime is 55828435853. The next prime is 55828435907. The reversal of 55828435866 is 66853482855.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 183735 + ... + 381333.

It is an arithmetic number, because the mean of its divisors is an integer number (1864059600).

Almost surely, 2^55828435866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55828435866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67106145600).

55828435866 is an abundant number, since it is smaller than the sum of its proper divisors (78383855334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55828435866 is a wasteful number, since it uses less digits than its factorization.

55828435866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197680 (or 197642 counting only the distinct ones).

The product of its digits is 55296000, while the sum is 60.

It can be divided in two parts, 5582 and 8435866, that added together give a palindrome (8441448).

The spelling of 55828435866 in words is "fifty-five billion, eight hundred twenty-eight million, four hundred thirty-five thousand, eight hundred sixty-six".