63953332866 has 64 divisors (see below), whose sum is σ = 143073567360. Its totient is φ = 21175007040.

The previous prime is 63953332829. The next prime is 63953332901. The reversal of 63953332866 is 66823335936.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4944640 + ... + 4957556.

It is an arithmetic number, because the mean of its divisors is an integer number (2235524490).

Almost surely, 2^63953332866 is an apocalyptic number.

63953332866 is an abundant number, since it is smaller than the sum of its proper divisors (79120234494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63953332866 is a wasteful number, since it uses less digits than its factorization.

63953332866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13536 (or 13530 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 54.

The spelling of 63953332866 in words is "sixty-three billion, nine hundred fifty-three million, three hundred thirty-two thousand, eight hundred sixty-six".