6497818729 has 4 divisors (see below), whose sum is σ = 6548982784. Its totient is φ = 6446654676.

The previous prime is 6497818699. The next prime is 6497818763. The reversal of 6497818729 is 9278187946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6497818729 - 2⁷ = 6497818601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6497818799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25581837 + ... + 25582090.

It is an arithmetic number, because the mean of its divisors is an integer number (1637245696).

Almost surely, 2^6497818729 is an apocalyptic number.

It is an amenable number.

6497818729 is a deficient number, since it is larger than the sum of its proper divisors (51164055).

6497818729 is a wasteful number, since it uses less digits than its factorization.

6497818729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51164054.

The product of its digits is 12192768, while the sum is 61.

The square root of 6497818729 is about 80609.0486794132. The cubic root of 6497818729 is about 1866.0467956077.

The spelling of 6497818729 in words is "six billion, four hundred ninety-seven million, eight hundred eighteen thousand, seven hundred twenty-nine".