6491661946 has 32 divisors (see below), whose sum is σ = 12144250368. Its totient is φ = 2528385840.

The previous prime is 6491661941. The next prime is 6491661997.

6491661946 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6491661946² = 84283349642289013832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6491661893 and 6491661902.

It is not an unprimeable number, because it can be changed into a prime (6491661941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685681 + ... + 695083.

It is an arithmetic number, because the mean of its divisors is an integer number (379507824).

Almost surely, 2^6491661946 is an apocalyptic number.

6491661946 is a deficient number, since it is larger than the sum of its proper divisors (5652588422).

6491661946 is a wasteful number, since it uses less digits than its factorization.

6491661946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13906.

The product of its digits is 1679616, while the sum is 52.

The square root of 6491661946 is about 80570.8504733567. The cubic root of 6491661946 is about 1865.4572400354.

The spelling of 6491661946 in words is "six billion, four hundred ninety-one million, six hundred sixty-one thousand, nine hundred forty-six".