6721145195 has 4 divisors (see below), whose sum is σ = 8065374240. Its totient is φ = 5376916152.

The previous prime is 6721145161. The next prime is 6721145209. The reversal of 6721145195 is 5915411276.

It is a happy number.

6721145195 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6721145195 - 2⁶ = 6721145131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672114515 + ... + 672114524.

It is an arithmetic number, because the mean of its divisors is an integer number (2016343560).

Almost surely, 2^6721145195 is an apocalyptic number.

6721145195 is a deficient number, since it is larger than the sum of its proper divisors (1344229045).

6721145195 is a wasteful number, since it uses less digits than its factorization.

6721145195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344229044.

The product of its digits is 75600, while the sum is 41.

The square root of 6721145195 is about 81982.5908043897. The cubic root of 6721145195 is about 1887.1847820609.

The spelling of 6721145195 in words is "six billion, seven hundred twenty-one million, one hundred forty-five thousand, one hundred ninety-five".