65649544 has 32 divisors (see below), whose sum is σ = 131929920. Its totient is φ = 30545856.

The previous prime is 65649539. The next prime is 65649593. The reversal of 65649544 is 44594656.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65649544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 11629.

It is an arithmetic number, because the mean of its divisors is an integer number (4122810).

Almost surely, 2^65649544 is an apocalyptic number.

It is an amenable number.

65649544 is an abundant number, since it is smaller than the sum of its proper divisors (66280376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65649544 is a wasteful number, since it uses less digits than its factorization.

65649544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9709 (or 9705 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 65649544 is about 8102.4406199614. The cubic root of 65649544 is about 403.4074409434.

The spelling of 65649544 in words is "sixty-five million, six hundred forty-nine thousand, five hundred forty-four".