6418621044 has 36 divisors (see below), whose sum is σ = 17699834880. Its totient is φ = 1945036560.

The previous prime is 6418621043. The next prime is 6418621061. The reversal of 6418621044 is 4401268146.

It is a happy number.

6418621044 is a `hidden beast` number, since 641 + 8 + 6 + 2 + 1 + 0 + 4 + 4 = 666.

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

It is a super-2 number, since 2×6418621044² = 82397392212959299872, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418621043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8103924 + ... + 8104715.

It is an arithmetic number, because the mean of its divisors is an integer number (491662080).

Almost surely, 2^6418621044 is an apocalyptic number.

It is an amenable number.

6418621044 is an abundant number, since it is smaller than the sum of its proper divisors (11281213836).

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

6418621044 is a wasteful number, since it uses less digits than its factorization.

6418621044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16208660 (or 16208655 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 6418621044 is about 80116.2969938077. The cubic root of 6418621044 is about 1858.4344405315.

The spelling of 6418621044 in words is "six billion, four hundred eighteen million, six hundred twenty-one thousand, forty-four".