6497165916989 has 8 divisors (see below), whose sum is σ = 7087860439968. Its totient is φ = 5906478573360.

The previous prime is 6497165916971. The next prime is 6497165916991. The reversal of 6497165916989 is 9896195617946.

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 6497165916989 - 2²⁰ = 6497164868413 is a prime.

It is a super-2 number, since 2×6497165916989² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497165916589) 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, 193139 + ... + 3609935.

It is an arithmetic number, because the mean of its divisors is an integer number (885982554996).

Almost surely, 2^{6497165916989} is an apocalyptic number.

It is an amenable number.

6497165916989 is a deficient number, since it is larger than the sum of its proper divisors (590694522979).

6497165916989 is a wasteful number, since it uses less digits than its factorization.

6497165916989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589675.

The product of its digits is 1587237120, while the sum is 80.

The spelling of 6497165916989 in words is "six trillion, four hundred ninety-seven billion, one hundred sixty-five million, nine hundred sixteen thousand, nine hundred eighty-nine".