6496761851809 has 4 divisors (see below), whose sum is σ = 6672350010004. Its totient is φ = 6321173693616.

The previous prime is 6496761851803. The next prime is 6496761851849. The reversal of 6496761851809 is 9081581676946.

It is a happy number.

6496761851809 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 can be written as a sum of positive squares in 2 ways, for example, as 5893727290000 + 603034561809 = 2427700^2 + 776553^2 .

It is a cyclic number.

It is not a de Polignac number, because 6496761851809 - 2¹³ = 6496761843617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6496761851803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87794079042 + ... + 87794079115.

It is an arithmetic number, because the mean of its divisors is an integer number (1668087502501).

Almost surely, 2^{6496761851809} is an apocalyptic number.

It is an amenable number.

6496761851809 is a deficient number, since it is larger than the sum of its proper divisors (175588158195).

6496761851809 is a wasteful number, since it uses less digits than its factorization.

6496761851809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175588158194.

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 6496761851809 in words is "six trillion, four hundred ninety-six billion, seven hundred sixty-one million, eight hundred fifty-one thousand, eight hundred nine".