55816484240 has 80 divisors (see below), whose sum is σ = 141683610240. Its totient is φ = 20280744960.

The previous prime is 55816484231. The next prime is 55816484287. The reversal of 55816484240 is 4248461855.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1109717 + ... + 1158923.

It is an arithmetic number, because the mean of its divisors is an integer number (1771045128).

Almost surely, 2^55816484240 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 55816484240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70841805120).

55816484240 is an abundant number, since it is smaller than the sum of its proper divisors (85867126000).

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

55816484240 is a wasteful number, since it uses less digits than its factorization.

55816484240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50520 (or 50514 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 47.

The spelling of 55816484240 in words is "fifty-five billion, eight hundred sixteen million, four hundred eighty-four thousand, two hundred forty".