4878551121444 has 384 divisors, whose sum is σ = 17441047142400. Its totient is φ = 1138068610560.

The previous prime is 4878551121439. The next prime is 4878551121467. The reversal of 4878551121444 is 4441211558784.

4878551121444 is a `hidden beast` number, since 4 + 8 + 7 + 85 + 5 + 112 + 1 + 444 = 666.

It is a super-2 number, since 2×4878551121444² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3390177 + ... + 4609815.

It is an arithmetic number, because the mean of its divisors is an integer number (45419393600).

Almost surely, 2^{4878551121444} is an apocalyptic number.

4878551121444 is a gapful number since it is divisible by the number (44) 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 4878551121444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8720523571200).

4878551121444 is an abundant number, since it is smaller than the sum of its proper divisors (12562496020956).

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

4878551121444 is a wasteful number, since it uses less digits than its factorization.

4878551121444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219720 (or 1219712 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 54.

The spelling of 4878551121444 in words is "four trillion, eight hundred seventy-eight billion, five hundred fifty-one million, one hundred twenty-one thousand, four hundred forty-four".