6404650272 has 72 divisors (see below), whose sum is σ = 18705504636. Its totient is φ = 2077180416.

The previous prime is 6404650253. The next prime is 6404650277. The reversal of 6404650272 is 2720564046.

6404650272 is a `hidden beast` number, since 6 + 40 + 46 + 502 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5673704976 + 730945296 = 75324^2 + 27036^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (6404650277) 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 11 ways as a sum of consecutive naturals, for example, 289863 + ... + 311174.

Almost surely, 2^6404650272 is an apocalyptic number.

It is an amenable number.

6404650272 is an abundant number, since it is smaller than the sum of its proper divisors (12300854364).

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

6404650272 is a wasteful number, since it uses less digits than its factorization.

6404650272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601090 (or 601079 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 6404650272 is about 80029.0589223689. The cubic root of 6404650272 is about 1857.0851047963.

The spelling of 6404650272 in words is "six billion, four hundred four million, six hundred fifty thousand, two hundred seventy-two".