5545551212500 has 216 divisors, whose sum is σ = 13490168214600. Its totient is φ = 1992219840000.

The previous prime is 5545551212441. The next prime is 5545551212503. The reversal of 5545551212500 is 52121555455.

It is a happy number.

It can be written as a sum of positive squares in 36 ways, for example, as 2782070546116 + 2763480666384 = 1667954^2 + 1662372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5545551212503) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78127026 + ... + 78197974.

It is an arithmetic number, because the mean of its divisors is an integer number (62454482475).

Almost surely, 2^{5545551212500} is an apocalyptic number.

5545551212500 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 5545551212500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6745084107300).

5545551212500 is an abundant number, since it is smaller than the sum of its proper divisors (7944617002100).

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

5545551212500 is a wasteful number, since it uses less digits than its factorization.

5545551212500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71041 (or 71006 counting only the distinct ones).

The product of its (nonzero) digits is 250000, while the sum is 40.

Adding to 5545551212500 its reverse (52121555455), we get a palindrome (5597672767955).

The spelling of 5545551212500 in words is "five trillion, five hundred forty-five billion, five hundred fifty-one million, two hundred twelve thousand, five hundred".