65053640 has 32 divisors (see below), whose sum is σ = 149489280. Its totient is φ = 25467072.

The previous prime is 65053619. The next prime is 65053643. The reversal of 65053640 is 4635056.

It is not an unprimeable number, because it can be changed into a prime (65053643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15422 + ... + 19181.

It is an arithmetic number, because the mean of its divisors is an integer number (4671540).

Almost surely, 2^65053640 is an apocalyptic number.

It is an amenable number.

65053640 is an abundant number, since it is smaller than the sum of its proper divisors (84435640).

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

65053640 is a wasteful number, since it uses less digits than its factorization.

65053640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34661 (or 34657 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 65053640 is about 8065.5836738577. The cubic root of 65053640 is about 402.1831463361.

Adding to 65053640 its reverse (4635056), we get a palindrome (69688696).

The spelling of 65053640 in words is "sixty-five million, fifty-three thousand, six hundred forty".