7640659968489 has 12 divisors (see below), whose sum is σ = 11176211488000. Its totient is φ = 5029295168664.

The previous prime is 7640659968457. The next prime is 7640659968497. The reversal of 7640659968489 is 9848699560467.

7640659968489 is a `hidden beast` number, since 7 + 6 + 40 + 6 + 5 + 9 + 96 + 8 + 489 = 666.

It is not a de Polignac number, because 7640659968489 - 2⁵ = 7640659968457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7640659968439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5373177889 + ... + 5373179310.

Almost surely, 2^{7640659968489} is an apocalyptic number.

7640659968489 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

7640659968489 is a deficient number, since it is larger than the sum of its proper divisors (3535551519511).

7640659968489 is a wasteful number, since it uses less digits than its factorization.

7640659968489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10746357284 (or 10746357281 counting only the distinct ones).

The product of its (nonzero) digits is 5643509760, while the sum is 81.

The spelling of 7640659968489 in words is "seven trillion, six hundred forty billion, six hundred fifty-nine million, nine hundred sixty-eight thousand, four hundred eighty-nine".