6445646346 has 16 divisors (see below), whose sum is σ = 13239706464. Its totient is φ = 2090479824.

The previous prime is 6445646341. The next prime is 6445646353. The reversal of 6445646346 is 6436465446.

It is a junction number, because it is equal to n+sod(n) for n = 6445646295 and 6445646304.

It is not an unprimeable number, because it can be changed into a prime (6445646341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14517000 + ... + 14517443.

It is an arithmetic number, because the mean of its divisors is an integer number (827481654).

Almost surely, 2^6445646346 is an apocalyptic number.

6445646346 is an abundant number, since it is smaller than the sum of its proper divisors (6794060118).

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

6445646346 is a wasteful number, since it uses less digits than its factorization.

6445646346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29034485.

The product of its digits is 4976640, while the sum is 48.

The square root of 6445646346 is about 80284.7827798021. The cubic root of 6445646346 is about 1861.0390719848.

Subtracting from 6445646346 its reverse (6436465446), we obtain a square (9180900 = 3030²).

The spelling of 6445646346 in words is "six billion, four hundred forty-five million, six hundred forty-six thousand, three hundred forty-six".