63965955 has 16 divisors (see below), whose sum is σ = 102448800. Its totient is φ = 34080768.

The previous prime is 63965953. The next prime is 63965981. The reversal of 63965955 is 55956936.

It is not a de Polignac number, because 63965955 - 2¹ = 63965953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63965953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21859 + ... + 24611.

It is an arithmetic number, because the mean of its divisors is an integer number (6403050).

Almost surely, 2^63965955 is an apocalyptic number.

63965955 is a deficient number, since it is larger than the sum of its proper divisors (38482845).

63965955 is a wasteful number, since it uses less digits than its factorization.

63965955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310.

The product of its digits is 1093500, while the sum is 48.

The square root of 63965955 is about 7997.8719044506. The cubic root of 63965955 is about 399.9290603363.

The spelling of 63965955 in words is "sixty-three million, nine hundred sixty-five thousand, nine hundred fifty-five".