55204121140 has 192 divisors, whose sum is σ = 145843568640. Its totient is φ = 17114042880.

The previous prime is 55204121111. The next prime is 55204121171. The reversal of 55204121140 is 4112140255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44844325 + ... + 44845555.

It is an arithmetic number, because the mean of its divisors is an integer number (759601920).

Almost surely, 2^55204121140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55204121140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72921784320).

55204121140 is an abundant number, since it is smaller than the sum of its proper divisors (90639447500).

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

55204121140 is a wasteful number, since it uses less digits than its factorization.

55204121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022 (or 2020 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 55204121140 its reverse (4112140255), we get a palindrome (59316261395).

The spelling of 55204121140 in words is "fifty-five billion, two hundred four million, one hundred twenty-one thousand, one hundred forty".