63281109361 has 4 divisors (see below), whose sum is σ = 64991409652. Its totient is φ = 61570809072.

The previous prime is 63281109347. The next prime is 63281109373. The reversal of 63281109361 is 16390118236.

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 28552550625 + 34728558736 = 168975^2 + 186356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63281109361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63281109301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855150090 + ... + 855150163.

It is an arithmetic number, because the mean of its divisors is an integer number (16247852413).

Almost surely, 2^63281109361 is an apocalyptic number.

It is an amenable number.

63281109361 is a deficient number, since it is larger than the sum of its proper divisors (1710300291).

63281109361 is a wasteful number, since it uses less digits than its factorization.

63281109361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710300290.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 63281109361 in words is "sixty-three billion, two hundred eighty-one million, one hundred nine thousand, three hundred sixty-one".