55121433204 has 96 divisors (see below), whose sum is σ = 134445507840. Its totient is φ = 17555328000.

The previous prime is 55121433187. The next prime is 55121433217. The reversal of 55121433204 is 40233412155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14764122 + ... + 14767854.

It is an arithmetic number, because the mean of its divisors is an integer number (1400474040).

Almost surely, 2^55121433204 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 55121433204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67222753920).

55121433204 is an abundant number, since it is smaller than the sum of its proper divisors (79324074636).

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

55121433204 is a wasteful number, since it uses less digits than its factorization.

55121433204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4199 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 55121433204 its reverse (40233412155), we get a palindrome (95354845359).

The spelling of 55121433204 in words is "fifty-five billion, one hundred twenty-one million, four hundred thirty-three thousand, two hundred four".