63394355161 has 4 divisors (see below), whose sum is σ = 63445112500. Its totient is φ = 63343597824.

The previous prime is 63394355159. The next prime is 63394355203. The reversal of 63394355161 is 16155349336.

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 38909929536 + 24484425625 = 197256^2 + 156475^2 .

It is a cyclic number.

It is not a de Polignac number, because 63394355161 - 2¹ = 63394355159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63394355861) 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 3 ways as a sum of consecutive naturals, for example, 25376796 + ... + 25379293.

It is an arithmetic number, because the mean of its divisors is an integer number (15861278125).

Almost surely, 2^63394355161 is an apocalyptic number.

It is an amenable number.

63394355161 is a deficient number, since it is larger than the sum of its proper divisors (50757339).

63394355161 is a wasteful number, since it uses less digits than its factorization.

63394355161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50757338.

The product of its digits is 874800, while the sum is 46.

The spelling of 63394355161 in words is "sixty-three billion, three hundred ninety-four million, three hundred fifty-five thousand, one hundred sixty-one".