1318216449 has 8 divisors (see below), whose sum is σ = 1917405792. Its totient is φ = 798919040.

The previous prime is 1318216433. The next prime is 1318216453. The reversal of 1318216449 is 9446128131.

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

It is a cyclic number.

It is not a de Polignac number, because 1318216449 - 2⁴ = 1318216433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318216349) 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, 19972944 + ... + 19973009.

It is an arithmetic number, because the mean of its divisors is an integer number (239675724).

Almost surely, 2^1318216449 is an apocalyptic number.

It is an amenable number.

1318216449 is a deficient number, since it is larger than the sum of its proper divisors (599189343).

1318216449 is a wasteful number, since it uses less digits than its factorization.

1318216449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39945967.

The product of its digits is 41472, while the sum is 39.

The square root of 1318216449 is about 36307.2506395073. The cubic root of 1318216449 is about 1096.4670255649.

The spelling of 1318216449 in words is "one billion, three hundred eighteen million, two hundred sixteen thousand, four hundred forty-nine".