55128383100 has 432 divisors, whose sum is σ = 205737831936. Its totient is φ = 12083904000.

The previous prime is 55128383059. The next prime is 55128383117. The reversal of 55128383100 is 138382155.

55128383100 is a `hidden beast` number, since 5 + 512 + 8 + 38 + 3 + 100 = 666.

It is a super-2 number, since 2×55128383100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 16548435 + ... + 16551765.

Almost surely, 2^55128383100 is an apocalyptic number.

55128383100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55128383100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102868915968).

55128383100 is an abundant number, since it is smaller than the sum of its proper divisors (150609448836).

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

55128383100 is a wasteful number, since it uses less digits than its factorization.

55128383100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 55128383100 in words is "fifty-five billion, one hundred twenty-eight million, three hundred eighty-three thousand, one hundred".