55616140 has 24 divisors (see below), whose sum is σ = 118711152. Its totient is φ = 21881280.

The previous prime is 55616137. The next prime is 55616147. The reversal of 55616140 is 4161655.

It is a junction number, because it is equal to n+sod(n) for n = 55616099 and 55616108.

It is not an unprimeable number, because it can be changed into a prime (55616147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21574 + ... + 24013.

It is an arithmetic number, because the mean of its divisors is an integer number (4946298).

Almost surely, 2^55616140 is an apocalyptic number.

It is an amenable number.

55616140 is an abundant number, since it is smaller than the sum of its proper divisors (63095012).

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

55616140 is a wasteful number, since it uses less digits than its factorization.

55616140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45657 (or 45655 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 55616140 is about 7457.6229456845. The cubic root of 55616140 is about 381.7100675481.

Adding to 55616140 its reverse (4161655), we get a palindrome (59777795).

The spelling of 55616140 in words is "fifty-five million, six hundred sixteen thousand, one hundred forty".