6469165991 has 2 divisors, whose sum is σ = 6469165992. Its totient is φ = 6469165990.

The previous prime is 6469165973. The next prime is 6469165993. The reversal of 6469165991 is 1995619646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6469165991 - 2²² = 6464971687 is a prime.

It is a super-2 number, since 2×6469165991² = 83700217238222024162, which contains 22 as substring.

Together with 6469165993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6469165993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234582995 + 3234582996.

It is an arithmetic number, because the mean of its divisors is an integer number (3234582996).

Almost surely, 2^6469165991 is an apocalyptic number.

6469165991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6469165991 is an equidigital number, since it uses as much as digits as its factorization.

6469165991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 56.

The square root of 6469165991 is about 80431.1257598699. The cubic root of 6469165991 is about 1863.2999182830.

The spelling of 6469165991 in words is "six billion, four hundred sixty-nine million, one hundred sixty-five thousand, nine hundred ninety-one".