1144191915 has 12 divisors (see below), whose sum is σ = 1983266064. Its totient is φ = 610235664.

The previous prime is 1144191889. The next prime is 1144191929. The reversal of 1144191915 is 5191914411.

It is not a de Polignac number, because 1144191915 - 2¹² = 1144187819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144191915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12713199 + ... + 12713288.

It is an arithmetic number, because the mean of its divisors is an integer number (165272172).

Almost surely, 2^1144191915 is an apocalyptic number.

1144191915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1144191915 is a deficient number, since it is larger than the sum of its proper divisors (839074149).

1144191915 is a wasteful number, since it uses less digits than its factorization.

1144191915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25426498 (or 25426495 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 1144191915 is about 33825.9059745633. The cubic root of 1144191915 is about 1045.9227870696.

The spelling of 1144191915 in words is "one billion, one hundred forty-four million, one hundred ninety-one thousand, nine hundred fifteen".