6497663831 has 4 divisors (see below), whose sum is σ = 6497863200. Its totient is φ = 6497464464.

The previous prime is 6497663827. The next prime is 6497663867. The reversal of 6497663831 is 1383667946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6497663831 - 2² = 6497663827 is a prime.

It is a super-2 number, since 2×6497663831² = 84439270521371193122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497669831) 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, 38126 + ... + 120203.

It is an arithmetic number, because the mean of its divisors is an integer number (1624465800).

Almost surely, 2^6497663831 is an apocalyptic number.

6497663831 is a deficient number, since it is larger than the sum of its proper divisors (199369).

6497663831 is a wasteful number, since it uses less digits than its factorization.

6497663831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199368.

The product of its digits is 3919104, while the sum is 53.

The square root of 6497663831 is about 80608.0878758453. The cubic root of 6497663831 is about 1866.0319675952.

The spelling of 6497663831 in words is "six billion, four hundred ninety-seven million, six hundred sixty-three thousand, eight hundred thirty-one".