55640116 has 48 divisors (see below), whose sum is σ = 120742272. Its totient is φ = 21888000.

The previous prime is 55640111. The next prime is 55640131. The reversal of 55640116 is 61104655.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18091 + ... + 20941.

It is an arithmetic number, because the mean of its divisors is an integer number (2515464).

Almost surely, 2^55640116 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 55640116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60371136).

55640116 is an abundant number, since it is smaller than the sum of its proper divisors (65102156).

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

55640116 is a wasteful number, since it uses less digits than its factorization.

55640116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920 (or 2918 counting only the distinct ones).

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

The square root of 55640116 is about 7459.2302551939. The cubic root of 55640116 is about 381.7649111347.

The spelling of 55640116 in words is "fifty-five million, six hundred forty thousand, one hundred sixteen".