63680380849 has 4 divisors (see below), whose sum is σ = 63686962980. Its totient is φ = 63673798720.

The previous prime is 63680380843. The next prime is 63680380871. The reversal of 63680380849 is 94808308636.

It is a happy number.

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 37934573824 + 25745807025 = 194768^2 + 160455^2 .

It is a cyclic number.

It is not a de Polignac number, because 63680380849 - 2⁷ = 63680380721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63680380849.

It is not an unprimeable number, because it can be changed into a prime (63680380843) 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, 3276532 + ... + 3295909.

It is an arithmetic number, because the mean of its divisors is an integer number (15921740745).

Almost surely, 2^63680380849 is an apocalyptic number.

It is an amenable number.

63680380849 is a deficient number, since it is larger than the sum of its proper divisors (6582131).

63680380849 is an equidigital number, since it uses as much as digits as its factorization.

63680380849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582130.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 63680380849 in words is "sixty-three billion, six hundred eighty million, three hundred eighty thousand, eight hundred forty-nine".