1144663665 has 8 divisors (see below), whose sum is σ = 1831461888. Its totient is φ = 610487280.

The previous prime is 1144663649. The next prime is 1144663693. The reversal of 1144663665 is 5663664411.

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

It is not a de Polignac number, because 1144663665 - 2⁴ = 1144663649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38155441 + ... + 38155470.

It is an arithmetic number, because the mean of its divisors is an integer number (228932736).

Almost surely, 2^1144663665 is an apocalyptic number.

1144663665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1144663665 is a deficient number, since it is larger than the sum of its proper divisors (686798223).

1144663665 is an equidigital number, since it uses as much as digits as its factorization.

1144663665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76310919.

The product of its digits is 311040, while the sum is 42.

The square root of 1144663665 is about 33832.8784616385. The cubic root of 1144663665 is about 1046.0665118743.

The spelling of 1144663665 in words is "one billion, one hundred forty-four million, six hundred sixty-three thousand, six hundred sixty-five".