63948096649 has 4 divisors (see below), whose sum is σ = 66153203460. Its totient is φ = 61742989840.

The previous prime is 63948096587. The next prime is 63948096659. The reversal of 63948096649 is 94669084936.

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 42233127049 + 21714969600 = 205507^2 + 147360^2 .

It is a cyclic number.

It is not a de Polignac number, because 63948096649 - 2¹¹ = 63948094601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63948096659) 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 3 ways as a sum of consecutive naturals, for example, 1102553362 + ... + 1102553419.

It is an arithmetic number, because the mean of its divisors is an integer number (16538300865).

Almost surely, 2^63948096649 is an apocalyptic number.

It is an amenable number.

63948096649 is a deficient number, since it is larger than the sum of its proper divisors (2205106811).

63948096649 is a wasteful number, since it uses less digits than its factorization.

63948096649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205106810.

The product of its (nonzero) digits is 60466176, while the sum is 64.

The spelling of 63948096649 in words is "sixty-three billion, nine hundred forty-eight million, ninety-six thousand, six hundred forty-nine".