1663430144 has 80 divisors (see below), whose sum is σ = 3539023488. Its totient is φ = 778371072.

The previous prime is 1663430117. The next prime is 1663430179. The reversal of 1663430144 is 4410343661.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1663430144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1940564 + ... + 1941420.

Almost surely, 2^1663430144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663430144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769511744).

1663430144 is an abundant number, since it is smaller than the sum of its proper divisors (1875593344).

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

1663430144 is an equidigital number, since it uses as much as digits as its factorization.

1663430144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1663430144 is about 40785.1706383583. The cubic root of 1663430144 is about 1184.8631397900.

The spelling of 1663430144 in words is "one billion, six hundred sixty-three million, four hundred thirty thousand, one hundred forty-four".