6440241276 has 36 divisors (see below), whose sum is σ = 18605142192. Its totient is φ = 1840068864.

The previous prime is 6440241263. The next prime is 6440241281. The reversal of 6440241276 is 6721420446.

6440241276 is a `hidden beast` number, since 644 + 0 + 2 + 4 + 1 + 2 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6440241276.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12778005 + ... + 12778508.

Almost surely, 2^6440241276 is an apocalyptic number.

It is an amenable number.

6440241276 is an abundant number, since it is smaller than the sum of its proper divisors (12164900916).

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

6440241276 is a wasteful number, since it uses less digits than its factorization.

6440241276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25556530 (or 25556525 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 6440241276 is about 80251.1138614287. The cubic root of 6440241276 is about 1860.5187280226.

The spelling of 6440241276 in words is "six billion, four hundred forty million, two hundred forty-one thousand, two hundred seventy-six".