663109443425 has 48 divisors (see below), whose sum is σ = 971012934528. Its totient is φ = 442857369600.

The previous prime is 663109443397. The next prime is 663109443439. The reversal of 663109443425 is 524344901366.

663109443425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663109443425 - 2²⁰ = 663108394849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663109443425.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209444 + ... + 1170506.

It is an arithmetic number, because the mean of its divisors is an integer number (20229436136).

Almost surely, 2^663109443425 is an apocalyptic number.

663109443425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663109443425 is a deficient number, since it is larger than the sum of its proper divisors (307903491103).

663109443425 is a wasteful number, since it uses less digits than its factorization.

663109443425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961290 (or 961285 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 663109443425 in words is "six hundred sixty-three billion, one hundred nine million, four hundred forty-three thousand, four hundred twenty-five".