1318898664 has 24 divisors (see below), whose sum is σ = 3572017410. Its totient is φ = 439632864.

The previous prime is 1318898657. The next prime is 1318898687. The reversal of 1318898664 is 4668988131.

It can be written as a sum of positive squares in only one way, i.e., 1118902500 + 199996164 = 33450^2 + 14142^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1318898664.

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 5 ways as a sum of consecutive naturals, for example, 9158947 + ... + 9159090.

Almost surely, 2^1318898664 is an apocalyptic number.

It is an amenable number.

1318898664 is an abundant number, since it is smaller than the sum of its proper divisors (2253118746).

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

1318898664 is a wasteful number, since it uses less digits than its factorization.

1318898664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18318049 (or 18318042 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1318898664 is about 36316.6444485170. The cubic root of 1318898664 is about 1096.6561440383.

The spelling of 1318898664 in words is "one billion, three hundred eighteen million, eight hundred ninety-eight thousand, six hundred sixty-four".