65648540 has 12 divisors (see below), whose sum is σ = 137861976. Its totient is φ = 26259408.

The previous prime is 65648497. The next prime is 65648549. The reversal of 65648540 is 4584656.

It is a junction number, because it is equal to n+sod(n) for n = 65648494 and 65648503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65648549) 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 3 ways as a sum of consecutive naturals, for example, 1641194 + ... + 1641233.

It is an arithmetic number, because the mean of its divisors is an integer number (11488498).

Almost surely, 2^65648540 is an apocalyptic number.

It is an amenable number.

65648540 is an abundant number, since it is smaller than the sum of its proper divisors (72213436).

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

65648540 is a wasteful number, since it uses less digits than its factorization.

65648540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282436 (or 3282434 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 65648540 is about 8102.3786630841. The cubic root of 65648540 is about 403.4053844522.

The spelling of 65648540 in words is "sixty-five million, six hundred forty-eight thousand, five hundred forty".