63198440449 has 3 divisors (see below), whose sum is σ = 63198691843. Its totient is φ = 63198189056.

The previous prime is 63198440441. The next prime is 63198440477. The reversal of 63198440449 is 94404489136.

The square root of 63198440449 is 251393.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 24716556225 + 38481884224 = 157215^2 + 196168^2 .

It is not a de Polignac number, because 63198440449 - 2³ = 63198440441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63198440396 and 63198440405.

It is not an unprimeable number, because it can be changed into a prime (63198440441) 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 2 ways as a sum of consecutive naturals, for example, 125697 + ... + 377089.

Almost surely, 2^63198440449 is an apocalyptic number.

63198440449 is the 251393-rd square number.

63198440449 is the 125697-th centered octagonal number.

It is an amenable number.

63198440449 is a deficient number, since it is larger than the sum of its proper divisors (251394).

63198440449 is an frugal number, since it uses more digits than its factorization.

63198440449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502786 (or 251393 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 63198440449 in words is "sixty-three billion, one hundred ninety-eight million, four hundred forty thousand, four hundred forty-nine".