1445663985 has 8 divisors (see below), whose sum is σ = 2313062400. Its totient is φ = 771020784.

The previous prime is 1445663983. The next prime is 1445664061. The reversal of 1445663985 is 5893665441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1445663985 - 2¹ = 1445663983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1445663981) 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, 48188785 + ... + 48188814.

It is an arithmetic number, because the mean of its divisors is an integer number (289132800).

Almost surely, 2^1445663985 is an apocalyptic number.

1445663985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1445663985 is a deficient number, since it is larger than the sum of its proper divisors (867398415).

1445663985 is an equidigital number, since it uses as much as digits as its factorization.

1445663985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96377607.

The product of its digits is 3110400, while the sum is 51.

The square root of 1445663985 is about 38021.8882355940. Note that the first 3 decimals coincide. The cubic root of 1445663985 is about 1130.7218571463.

The spelling of 1445663985 in words is "one billion, four hundred forty-five million, six hundred sixty-three thousand, nine hundred eighty-five".