55545045421500 has 240 divisors, whose sum is σ = 182008109162880. Its totient is φ = 14747328374400.

The previous prime is 55545045421499. The next prime is 55545045421513. The reversal of 55545045421500 is 512454054555.

It is a happy number.

55545045421500 is a `hidden beast` number, since 5 + 5 + 5 + 4 + 50 + 4 + 542 + 1 + 50 + 0 = 666.

55545045421500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55545045421500² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6279997 + ... + 12269003.

It is an arithmetic number, because the mean of its divisors is an integer number (758367121512).

Almost surely, 2^{55545045421500} is an apocalyptic number.

55545045421500 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 55545045421500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91004054581440).

55545045421500 is an abundant number, since it is smaller than the sum of its proper divisors (126463063741380).

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

55545045421500 is a wasteful number, since it uses less digits than its factorization.

55545045421500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989267 (or 5989246 counting only the distinct ones).

The product of its (nonzero) digits is 2000000, while the sum is 45.

The spelling of 55545045421500 in words is "fifty-five trillion, five hundred forty-five billion, forty-five million, four hundred twenty-one thousand, five hundred".