663843531404 has 24 divisors (see below), whose sum is σ = 1205125051200. Its totient is φ = 319727041920.

The previous prime is 663843531401. The next prime is 663843531469. The reversal of 663843531404 is 404135348366.

It is a super-2 number, since 2×663843531404² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663843531401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25606199 + ... + 25632110.

It is an arithmetic number, because the mean of its divisors is an integer number (50213543800).

Almost surely, 2^663843531404 is an apocalyptic number.

It is an amenable number.

663843531404 is a deficient number, since it is larger than the sum of its proper divisors (541281519796).

663843531404 is a wasteful number, since it uses less digits than its factorization.

663843531404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51238433 (or 51238431 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 663843531404 in words is "six hundred sixty-three billion, eight hundred forty-three million, five hundred thirty-one thousand, four hundred four".