55556207100 has 180 divisors, whose sum is σ = 189570288600. Its totient is φ = 14035213440.

The previous prime is 55556207089. The next prime is 55556207143. The reversal of 55556207100 is 170265555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

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 59 ways as a sum of consecutive naturals, for example, 26595 + ... + 334394.

It is an arithmetic number, because the mean of its divisors is an integer number (1053168270).

Almost surely, 2^55556207100 is an apocalyptic number.

55556207100 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 55556207100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94785144300).

55556207100 is an abundant number, since it is smaller than the sum of its proper divisors (134014081500).

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

55556207100 is a wasteful number, since it uses less digits than its factorization.

55556207100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361034 (or 361018 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The spelling of 55556207100 in words is "fifty-five billion, five hundred fifty-six million, two hundred seven thousand, one hundred".