1318971465 has 96 divisors (see below), whose sum is σ = 2791704960. Its totient is φ = 588809088.

The previous prime is 1318971461. The next prime is 1318971499. The reversal of 1318971465 is 5641798131.

1318971465 is a `hidden beast` number, since 1 + 3 + 189 + 7 + 1 + 465 = 666.

It is not a de Polignac number, because 1318971465 - 2² = 1318971461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1318971465.

It is not an unprimeable number, because it can be changed into a prime (1318971461) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 282127 + ... + 286763.

It is an arithmetic number, because the mean of its divisors is an integer number (29080260).

Almost surely, 2^1318971465 is an apocalyptic number.

1318971465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1318971465 is an abundant number, since it is smaller than the sum of its proper divisors (1472733495).

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

1318971465 is a wasteful number, since it uses less digits than its factorization.

1318971465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708 (or 4695 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 1318971465 is about 36317.6467436975. The cubic root of 1318971465 is about 1096.6763215286.

The spelling of 1318971465 in words is "one billion, three hundred eighteen million, nine hundred seventy-one thousand, four hundred sixty-five".