5245561440 has 144 divisors (see below), whose sum is σ = 20457728928. Its totient is φ = 1198983168.

The previous prime is 5245561411. The next prime is 5245561457. The reversal of 5245561440 is 441655425.

5245561440 is a `hidden beast` number, since 52 + 4 + 5 + 561 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 = 5245561395 and 5245561404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250117 + ... + 270276.

It is an arithmetic number, because the mean of its divisors is an integer number (142067562).

Almost surely, 2^5245561440 is an apocalyptic number.

It is an amenable number.

5245561440 is an abundant number, since it is smaller than the sum of its proper divisors (15212167488).

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

5245561440 is a wasteful number, since it uses less digits than its factorization.

5245561440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520421 (or 520410 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 5245561440 is about 72426.2482805785. The cubic root of 5245561440 is about 1737.5233890197.

The spelling of 5245561440 in words is "five billion, two hundred forty-five million, five hundred sixty-one thousand, four hundred forty".