5645612440 has 64 divisors (see below), whose sum is σ = 14049524160. Its totient is φ = 2028188160.

The previous prime is 5645612389. The next prime is 5645612447. The reversal of 5645612440 is 442165465.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 5645612440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645612447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127476 + ... + 165955.

It is an arithmetic number, because the mean of its divisors is an integer number (219523815).

Almost surely, 2^5645612440 is an apocalyptic number.

It is an amenable number.

5645612440 is an abundant number, since it is smaller than the sum of its proper divisors (8403911720).

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

5645612440 is a wasteful number, since it uses less digits than its factorization.

5645612440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293492 (or 293488 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 5645612440 is about 75137.2906085919. The cubic root of 5645612440 is about 1780.6163375047.

The spelling of 5645612440 in words is "five billion, six hundred forty-five million, six hundred twelve thousand, four hundred forty".