5655821440 has 64 divisors (see below), whose sum is σ = 14108852160. Its totient is φ = 2163960832.

The previous prime is 5655821419. The next prime is 5655821449. The reversal of 5655821440 is 441285565.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×5655821440² = 63976632322327347200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 5655821393 and 5655821402.

It is not an unprimeable number, because it can be changed into a prime (5655821449) 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, 177394 + ... + 206833.

It is an arithmetic number, because the mean of its divisors is an integer number (220450815).

Almost surely, 2^5655821440 is an apocalyptic number.

It is an amenable number.

5655821440 is an abundant number, since it is smaller than the sum of its proper divisors (8453030720).

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

5655821440 is a wasteful number, since it uses less digits than its factorization.

5655821440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384269 (or 384257 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 40.

The square root of 5655821440 is about 75205.1955652001. The cubic root of 5655821440 is about 1781.6889914789.

The spelling of 5655821440 in words is "five billion, six hundred fifty-five million, eight hundred twenty-one thousand, four hundred forty".