55711018440 has 864 divisors, whose sum is σ = 237284087040. Its totient is φ = 11288471040.

The previous prime is 55711018373. The next prime is 55711018453. The reversal of 55711018440 is 4481011755.

55711018440 is a `hidden beast` number, since 5 + 571 + 1 + 0 + 1 + 84 + 4 + 0 = 666.

55711018440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55711018395 and 55711018404.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 91780617 + ... + 91781223.

It is an arithmetic number, because the mean of its divisors is an integer number (274634360).

Almost surely, 2^55711018440 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 55711018440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118642043520).

55711018440 is an abundant number, since it is smaller than the sum of its proper divisors (181573068600).

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

55711018440 is a wasteful number, since it uses less digits than its factorization.

55711018440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 55711018440 in words is "fifty-five billion, seven hundred eleven million, eighteen thousand, four hundred forty".