55421146000 has 480 divisors, whose sum is σ = 156294684000. Its totient is φ = 18962944000.

The previous prime is 55421145977. The next prime is 55421146043. The reversal of 55421146000 is 64112455.

It can be written as a sum of positive squares in 16 ways, for example, as 43552350864 + 11868795136 = 208692^2 + 108944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55421146000.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 371953926 + ... + 371954074.

It is an arithmetic number, because the mean of its divisors is an integer number (325613925).

Almost surely, 2^55421146000 is an apocalyptic number.

55421146000 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 55421146000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78147342000).

55421146000 is an abundant number, since it is smaller than the sum of its proper divisors (100873538000).

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

55421146000 is a wasteful number, since it uses less digits than its factorization.

55421146000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 55421146000 its reverse (64112455), we get a palindrome (55485258455).

The spelling of 55421146000 in words is "fifty-five billion, four hundred twenty-one million, one hundred forty-six thousand".