55120421334 has 128 divisors (see below), whose sum is σ = 128857817088. Its totient is φ = 15552092160.

The previous prime is 55120421327. The next prime is 55120421383. The reversal of 55120421334 is 43312402155.

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, 13767777 + ... + 13771779.

It is an arithmetic number, because the mean of its divisors is an integer number (1006701696).

Almost surely, 2^55120421334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55120421334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64428908544).

55120421334 is an abundant number, since it is smaller than the sum of its proper divisors (73737395754).

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

55120421334 is a wasteful number, since it uses less digits than its factorization.

55120421334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282.

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

Adding to 55120421334 its reverse (43312402155), we get a palindrome (98432823489).

The spelling of 55120421334 in words is "fifty-five billion, one hundred twenty million, four hundred twenty-one thousand, three hundred thirty-four".