65242688648 has 16 divisors (see below), whose sum is σ = 122336137500. Its totient is φ = 32619718656.

The previous prime is 65242688591. The next prime is 65242688657. The reversal of 65242688648 is 84688624256.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65136227524 + 106461124 = 255218^2 + 10318^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23273 + ... + 361976.

Almost surely, 2^65242688648 is an apocalyptic number.

It is an amenable number.

65242688648 is a deficient number, since it is larger than the sum of its proper divisors (57093448852).

65242688648 is a wasteful number, since it uses less digits than its factorization.

65242688648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406424 (or 406420 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 59.

The spelling of 65242688648 in words is "sixty-five billion, two hundred forty-two million, six hundred eighty-eight thousand, six hundred forty-eight".