6461271806 has 16 divisors (see below), whose sum is σ = 10586766960. Its totient is φ = 2933114880.

The previous prime is 6461271793. The next prime is 6461271809. The reversal of 6461271806 is 6081721646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461271809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174041 + ... + 207876.

It is an arithmetic number, because the mean of its divisors is an integer number (661672935).

Almost surely, 2^6461271806 is an apocalyptic number.

6461271806 is a deficient number, since it is larger than the sum of its proper divisors (4125495154).

6461271806 is a wasteful number, since it uses less digits than its factorization.

6461271806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382699.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 6461271806 is about 80382.0365877850. The cubic root of 6461271806 is about 1862.5416947620.

The spelling of 6461271806 in words is "six billion, four hundred sixty-one million, two hundred seventy-one thousand, eight hundred six".