55617882840 has 192 divisors, whose sum is σ = 195385357440. Its totient is φ = 13639726080.

The previous prime is 55617882773. The next prime is 55617882847. The reversal of 55617882840 is 4828871655.

55617882840 is a `hidden beast` number, since 5 + 561 + 78 + 8 + 2 + 8 + 4 + 0 = 666.

55617882840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55617882847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1246354 + ... + 1290206.

It is an arithmetic number, because the mean of its divisors is an integer number (1017632070).

Almost surely, 2^55617882840 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 55617882840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97692678720).

55617882840 is an abundant number, since it is smaller than the sum of its proper divisors (139767474600).

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

55617882840 is a wasteful number, since it uses less digits than its factorization.

55617882840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44154 (or 44147 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 55617882840 in words is "fifty-five billion, six hundred seventeen million, eight hundred eighty-two thousand, eight hundred forty".