65491956 has 48 divisors (see below), whose sum is σ = 179786880. Its totient is φ = 20545920.

The previous prime is 65491931. The next prime is 65491957. The reversal of 65491956 is 65919456.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65491957) 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 in 15 ways as a sum of consecutive naturals, for example, 16000 + ... + 19671.

It is an arithmetic number, because the mean of its divisors is an integer number (3745560).

Almost surely, 2^65491956 is an apocalyptic number.

It is an amenable number.

65491956 is an abundant number, since it is smaller than the sum of its proper divisors (114294924).

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

65491956 is a wasteful number, since it uses less digits than its factorization.

65491956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35701 (or 35693 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 65491956 is about 8092.7100528809. The cubic root of 65491956 is about 403.0843967759.

The spelling of 65491956 in words is "sixty-five million, four hundred ninety-one thousand, nine hundred fifty-six".