55500050400 has 144 divisors (see below), whose sum is σ = 180781398000. Its totient is φ = 14789468160.

The previous prime is 55500050393. The next prime is 55500050401. The reversal of 55500050400 is 405000555.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500050401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3710136 + ... + 3725064.

It is an arithmetic number, because the mean of its divisors is an integer number (1255426375).

Almost surely, 2^55500050400 is an apocalyptic number.

55500050400 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 55500050400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90390699000).

55500050400 is an abundant number, since it is smaller than the sum of its proper divisors (125281347600).

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

55500050400 is a wasteful number, since it uses less digits than its factorization.

55500050400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16501 (or 16488 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

Adding to 55500050400 its reverse (405000555), we get a palindrome (55905050955).

The spelling of 55500050400 in words is "fifty-five billion, five hundred million, fifty thousand, four hundred".