65491456 has 20 divisors (see below), whose sum is σ = 130856022. Its totient is φ = 32745472.

The previous prime is 65491453. The next prime is 65491469. The reversal of 65491456 is 65419456.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 10137856 = 7440^2 + 3184^2 .

It is not an unprimeable number, because it can be changed into a prime (65491453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63445 + ... + 64468.

Almost surely, 2^65491456 is an apocalyptic number.

It is an amenable number.

65491456 is a deficient number, since it is larger than the sum of its proper divisors (65364566).

65491456 is an equidigital number, since it uses as much as digits as its factorization.

65491456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127931 (or 127915 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 65491456 is about 8092.6791608218. The cubic root of 65491456 is about 403.0833709872.

The spelling of 65491456 in words is "sixty-five million, four hundred ninety-one thousand, four hundred fifty-six".