63945518495 has 16 divisors (see below), whose sum is σ = 80976793440. Its totient is φ = 48341867904.

The previous prime is 63945518477. The next prime is 63945518503. The reversal of 63945518495 is 59481554936.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63945518495 - 2⁸ = 63945518239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 810032 + ... + 885461.

It is an arithmetic number, because the mean of its divisors is an integer number (5061049590).

Almost surely, 2^63945518495 is an apocalyptic number.

63945518495 is a deficient number, since it is larger than the sum of its proper divisors (17031274945).

63945518495 is a wasteful number, since it uses less digits than its factorization.

63945518495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695914.

The product of its digits is 23328000, while the sum is 59.

It can be divided in two parts, 6394551 and 8495, that added together give a palindrome (6403046).

The spelling of 63945518495 in words is "sixty-three billion, nine hundred forty-five million, five hundred eighteen thousand, four hundred ninety-five".