6409763720 has 32 divisors (see below), whose sum is σ = 14425931520. Its totient is φ = 2563200960.

The previous prime is 6409763719. The next prime is 6409763747. The reversal of 6409763720 is 273679046.

It is a happy number.

It is a Cunningham number, because it is equal to 80061²-1.

It is an unprimeable number.

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, 140105 + ... + 180135.

It is an arithmetic number, because the mean of its divisors is an integer number (450810360).

Almost surely, 2^6409763720 is an apocalyptic number.

It is an amenable number.

6409763720 is an abundant number, since it is smaller than the sum of its proper divisors (8016167800).

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

6409763720 is a wasteful number, since it uses less digits than its factorization.

6409763720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44045 (or 44041 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 6409763720 is about 80060.9999937548. Note that the first 5 decimals coincide. The cubic root of 6409763720 is about 1857.5792031787.

The spelling of 6409763720 in words is "six billion, four hundred nine million, seven hundred sixty-three thousand, seven hundred twenty".