6461271788 has 24 divisors (see below), whose sum is σ = 11580063264. Its totient is φ = 3153584000.

The previous prime is 6461271781. The next prime is 6461271793. The reversal of 6461271788 is 8871721646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6461271781) 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 7 ways as a sum of consecutive naturals, for example, 83945 + ... + 141312.

It is an arithmetic number, because the mean of its divisors is an integer number (482502636).

Almost surely, 2^6461271788 is an apocalyptic number.

It is an amenable number.

6461271788 is a deficient number, since it is larger than the sum of its proper divisors (5118791476).

6461271788 is a wasteful number, since it uses less digits than its factorization.

6461271788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225433 (or 225431 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 6461271788 is about 80382.0364758196. The cubic root of 6461271788 is about 1862.5416930324.

The spelling of 6461271788 in words is "six billion, four hundred sixty-one million, two hundred seventy-one thousand, seven hundred eighty-eight".