6497779331 has 4 divisors (see below), whose sum is σ = 6507434952. Its totient is φ = 6488123712.

The previous prime is 6497779313. The next prime is 6497779363. The reversal of 6497779331 is 1339777946.

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 6497779331 - 2¹⁰ = 6497778307 is a prime.

It is a super-2 number, since 2×6497779331² = 84442272468741615122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6497779031) 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, 4826801 + ... + 4828146.

It is an arithmetic number, because the mean of its divisors is an integer number (1626858738).

Almost surely, 2^6497779331 is an apocalyptic number.

6497779331 is a deficient number, since it is larger than the sum of its proper divisors (9655621).

6497779331 is an equidigital number, since it uses as much as digits as its factorization.

6497779331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655620.

The product of its digits is 6001128, while the sum is 56.

The square root of 6497779331 is about 80608.8043020116. The cubic root of 6497779331 is about 1866.0430241544.

The spelling of 6497779331 in words is "six billion, four hundred ninety-seven million, seven hundred seventy-nine thousand, three hundred thirty-one".