63665544106828 has 48 divisors (see below), whose sum is σ = 120740368240800. Its totient is φ = 29256619521024.

The previous prime is 63665544106807. The next prime is 63665544106837. The reversal of 63665544106828 is 82860144556636.

It is a happy number.

It is a super-2 number, since 2×63665544106828² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63665544106828.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9875998 + ... + 14995546.

It is an arithmetic number, because the mean of its divisors is an integer number (2515424338350).

Almost surely, 2^{63665544106828} is an apocalyptic number.

63665544106828 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

63665544106828 is a deficient number, since it is larger than the sum of its proper divisors (57074824133972).

63665544106828 is a wasteful number, since it uses less digits than its factorization.

63665544106828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123866 (or 5123864 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 64.

The spelling of 63665544106828 in words is "sixty-three trillion, six hundred sixty-five billion, five hundred forty-four million, one hundred six thousand, eight hundred twenty-eight".