6465436898 has 6 divisors (see below), whose sum is σ = 9698325921. Its totient is φ = 3232661592.

The previous prime is 6465436883. The next prime is 6465436931. The reversal of 6465436898 is 8986345646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6413927569 + 51509329 = 80087^2 + 7177^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=56857.

It is a Duffinian number.

It is an unprimeable number.

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 in 2 ways as a sum of consecutive naturals, for example, 85286 + ... + 142142.

Almost surely, 2^6465436898 is an apocalyptic number.

6465436898 is a deficient number, since it is larger than the sum of its proper divisors (3232889023).

6465436898 is an frugal number, since it uses more digits than its factorization.

6465436898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113716 (or 56859 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 59.

The square root of 6465436898 is about 80407.9405158471. The cubic root of 6465436898 is about 1862.9418219308.

The spelling of 6465436898 in words is "six billion, four hundred sixty-five million, four hundred thirty-six thousand, eight hundred ninety-eight".