663853538792 has 8 divisors (see below), whose sum is σ = 1244725385250. Its totient is φ = 331926769392.

The previous prime is 663853538783. The next prime is 663853538801. The reversal of 663853538792 is 297835358366.

It is an interprime number because it is at equal distance from previous prime (663853538783) and next prime (663853538801).

It can be written as a sum of positive squares in only one way, i.e., 613330187716 + 50523351076 = 783154^2 + 224774^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×663853538792² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41490846167 + ... + 41490846182.

Almost surely, 2^663853538792 is an apocalyptic number.

It is an amenable number.

663853538792 is a deficient number, since it is larger than the sum of its proper divisors (580871846458).

663853538792 is a wasteful number, since it uses less digits than its factorization.

663853538792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82981692355 (or 82981692351 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 65.

The spelling of 663853538792 in words is "six hundred sixty-three billion, eight hundred fifty-three million, five hundred thirty-eight thousand, seven hundred ninety-two".