65481812 has 36 divisors (see below), whose sum is σ = 126791028. Its totient is φ = 29568000.

The previous prime is 65481751. The next prime is 65481817. The reversal of 65481812 is 21818456.

It can be written as a sum of positive squares in 2 ways, for example, as 37136836 + 28344976 = 6094^2 + 5324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65481817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93062 + ... + 93762.

It is an arithmetic number, because the mean of its divisors is an integer number (3521973).

Almost surely, 2^65481812 is an apocalyptic number.

It is an amenable number.

65481812 is a deficient number, since it is larger than the sum of its proper divisors (61309216).

65481812 is a wasteful number, since it uses less digits than its factorization.

65481812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 907 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 65481812 is about 8092.0832917117. The cubic root of 65481812 is about 403.0635845546.

The spelling of 65481812 in words is "sixty-five million, four hundred eighty-one thousand, eight hundred twelve".