6404644062 has 24 divisors (see below), whose sum is σ = 13937334840. Its totient is φ = 2125557360.

The previous prime is 6404644021. The next prime is 6404644067. The reversal of 6404644062 is 2604464046.

It is a happy number.

6404644062 is a `hidden beast` number, since 6 + 4 + 0 + 4 + 644 + 0 + 6 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404644067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772764 + ... + 781007.

It is an arithmetic number, because the mean of its divisors is an integer number (580722285).

Almost surely, 2^6404644062 is an apocalyptic number.

6404644062 is an abundant number, since it is smaller than the sum of its proper divisors (7532690778).

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

6404644062 is a wasteful number, since it uses less digits than its factorization.

6404644062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554008 (or 1554005 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 6404644062 is about 80029.0201239525. The cubic root of 6404644062 is about 1857.0845045813.

The spelling of 6404644062 in words is "six billion, four hundred four million, six hundred forty-four thousand, sixty-two".