6445269646 has 8 divisors (see below), whose sum is σ = 9674535240. Its totient is φ = 3220424568.

The previous prime is 6445269641. The next prime is 6445269673. The reversal of 6445269646 is 6469625446.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6445269593 and 6445269602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445269641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101481 + ... + 1107316.

It is an arithmetic number, because the mean of its divisors is an integer number (1209316905).

Almost surely, 2^6445269646 is an apocalyptic number.

6445269646 is a deficient number, since it is larger than the sum of its proper divisors (3229265594).

6445269646 is a wasteful number, since it uses less digits than its factorization.

6445269646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210258.

The product of its digits is 7464960, while the sum is 52.

The square root of 6445269646 is about 80282.4367218634. The cubic root of 6445269646 is about 1861.0028166564.

The spelling of 6445269646 in words is "six billion, four hundred forty-five million, two hundred sixty-nine thousand, six hundred forty-six".