55132320140 has 144 divisors (see below), whose sum is σ = 128894895360. Its totient is φ = 19742486400.

The previous prime is 55132320091. The next prime is 55132320151. The reversal of 55132320140 is 4102323155.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15700985 + ... + 15704495.

It is an arithmetic number, because the mean of its divisors is an integer number (895103440).

Almost surely, 2^55132320140 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 55132320140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64447447680).

55132320140 is an abundant number, since it is smaller than the sum of its proper divisors (73762575220).

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

55132320140 is a wasteful number, since it uses less digits than its factorization.

55132320140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644 (or 3611 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 55132320140 its reverse (4102323155), we get a palindrome (59234643295).

The spelling of 55132320140 in words is "fifty-five billion, one hundred thirty-two million, three hundred twenty thousand, one hundred forty".