63863966845 has 16 divisors (see below), whose sum is σ = 88892108928. Its totient is φ = 43138814400.

The previous prime is 63863966843. The next prime is 63863966851. The reversal of 63863966845 is 54866936836.

It is not a de Polignac number, because 63863966845 - 2¹ = 63863966843 is a prime.

It is a super-2 number, since 2×63863966845² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63863966843) by changing a digit.

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, 13614706 + ... + 13619395.

It is an arithmetic number, because the mean of its divisors is an integer number (5555756808).

Almost surely, 2^63863966845 is an apocalyptic number.

It is an amenable number.

63863966845 is a deficient number, since it is larger than the sum of its proper divisors (25028142083).

63863966845 is a wasteful number, since it uses less digits than its factorization.

63863966845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27234180.

The product of its digits is 134369280, while the sum is 64.

The spelling of 63863966845 in words is "sixty-three billion, eight hundred sixty-three million, nine hundred sixty-six thousand, eight hundred forty-five".