63961165 has 16 divisors (see below), whose sum is σ = 78220800. Its totient is φ = 50199552.

The previous prime is 63961151. The next prime is 63961169. The reversal of 63961165 is 56116936.

It is a cyclic number.

It is not a de Polignac number, because 63961165 - 2⁹ = 63960653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63961169) 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 15 ways as a sum of consecutive naturals, for example, 75816 + ... + 76654.

It is an arithmetic number, because the mean of its divisors is an integer number (4888800).

Almost surely, 2^63961165 is an apocalyptic number.

It is an amenable number.

63961165 is a deficient number, since it is larger than the sum of its proper divisors (14259635).

63961165 is a wasteful number, since it uses less digits than its factorization.

63961165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its digits is 29160, while the sum is 37.

The square root of 63961165 is about 7997.5724441858. The cubic root of 63961165 is about 399.9190773799.

The spelling of 63961165 in words is "sixty-three million, nine hundred sixty-one thousand, one hundred sixty-five".