63998074449 has 6 divisors (see below), whose sum is σ = 92441663106. Its totient is φ = 42665382960.

The previous prime is 63998074429. The next prime is 63998074451. The reversal of 63998074449 is 94447089936.

63998074449 is a `hidden beast` number, since 6 + 39 + 98 + 0 + 74 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47391113025 + 16606961424 = 217695^2 + 128868^2 .

It is not a de Polignac number, because 63998074449 - 2²³ = 63989685841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63998074429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3555448572 + ... + 3555448589.

It is an arithmetic number, because the mean of its divisors is an integer number (15406943851).

Almost surely, 2^63998074449 is an apocalyptic number.

It is an amenable number.

63998074449 is a deficient number, since it is larger than the sum of its proper divisors (28443588657).

63998074449 is a wasteful number, since it uses less digits than its factorization.

63998074449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110897167 (or 7110897164 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 63998074449 in words is "sixty-three billion, nine hundred ninety-eight million, seventy-four thousand, four hundred forty-nine".