63641155 has 4 divisors (see below), whose sum is σ = 76369392. Its totient is φ = 50912920.

The previous prime is 63641153. The next prime is 63641177. The reversal of 63641155 is 55114636.

63641155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63641155 - 2¹ = 63641153 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63641153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6364111 + ... + 6364120.

It is an arithmetic number, because the mean of its divisors is an integer number (19092348).

Almost surely, 2^63641155 is an apocalyptic number.

63641155 is a deficient number, since it is larger than the sum of its proper divisors (12728237).

63641155 is a wasteful number, since it uses less digits than its factorization.

63641155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12728236.

The product of its digits is 10800, while the sum is 31.

The square root of 63641155 is about 7977.5406611311. The cubic root of 63641155 is about 399.2510046403.

The spelling of 63641155 in words is "sixty-three million, six hundred forty-one thousand, one hundred fifty-five".