6497049561 has 4 divisors (see below), whose sum is σ = 8662732752. Its totient is φ = 4331366372.

The previous prime is 6497049551. The next prime is 6497049571. The reversal of 6497049561 is 1659407946.

6497049561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (6497049551) and next prime (6497049571).

It is a cyclic number.

It is not a de Polignac number, because 6497049561 - 2⁹ = 6497049049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6497049551) 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, 1082841591 + ... + 1082841596.

It is an arithmetic number, because the mean of its divisors is an integer number (2165683188).

Almost surely, 2^6497049561 is an apocalyptic number.

It is an amenable number.

6497049561 is a deficient number, since it is larger than the sum of its proper divisors (2165683191).

6497049561 is a wasteful number, since it uses less digits than its factorization.

6497049561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165683190.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 6497049561 is about 80604.2775601891. The cubic root of 6497049561 is about 1865.9731626867.

The spelling of 6497049561 in words is "six billion, four hundred ninety-seven million, forty-nine thousand, five hundred sixty-one".