6240445644 has 12 divisors (see below), whose sum is σ = 14561039864. Its totient is φ = 2080148544.

The previous prime is 6240445643. The next prime is 6240445681. The reversal of 6240445644 is 4465440426.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (6240445643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260018557 + ... + 260018580.

Almost surely, 2^6240445644 is an apocalyptic number.

It is an amenable number.

6240445644 is an abundant number, since it is smaller than the sum of its proper divisors (8320594220).

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

6240445644 is a wasteful number, since it uses less digits than its factorization.

6240445644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520037144 (or 520037142 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

The square root of 6240445644 is about 78996.4913398057. The cubic root of 6240445644 is about 1841.0766426623.

The spelling of 6240445644 in words is "six billion, two hundred forty million, four hundred forty-five thousand, six hundred forty-four".