6440037650 has 48 divisors (see below), whose sum is σ = 13015714560. Its totient is φ = 2361700800.

The previous prime is 6440037629. The next prime is 6440037661. The reversal of 6440037650 is 567300446.

It is a self number, because there is not a number n which added to its sum of digits gives 6440037650.

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, 79889 + ... + 138788.

It is an arithmetic number, because the mean of its divisors is an integer number (271160720).

Almost surely, 2^6440037650 is an apocalyptic number.

6440037650 is an abundant number, since it is smaller than the sum of its proper divisors (6575676910).

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

6440037650 is a wasteful number, since it uses less digits than its factorization.

6440037650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218739 (or 218734 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 6440037650 is about 80249.8451711902. The cubic root of 6440037650 is about 1860.4991193380.

The spelling of 6440037650 in words is "six billion, four hundred forty million, thirty-seven thousand, six hundred fifty".