1687118464 has 16 divisors (see below), whose sum is σ = 3361056570. Its totient is φ = 843559168.

The previous prime is 1687118429. The next prime is 1687118467. The reversal of 1687118464 is 4648117861.

It can be written as a sum of positive squares in only one way, i.e., 1635393600 + 51724864 = 40440^2 + 7192^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (1687118467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6590179 + ... + 6590434.

Almost surely, 2^1687118464 is an apocalyptic number.

It is an amenable number.

1687118464 is a deficient number, since it is larger than the sum of its proper divisors (1673938106).

1687118464 is an equidigital number, since it uses as much as digits as its factorization.

1687118464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180627 (or 13180615 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 1687118464 is about 41074.5476420617. The cubic root of 1687118464 is about 1190.4610561912.

The spelling of 1687118464 in words is "one billion, six hundred eighty-seven million, one hundred eighteen thousand, four hundred sixty-four".