65601601656 has 32 divisors (see below), whose sum is σ = 164684533200. Its totient is φ = 21776463360.

The previous prime is 65601601609. The next prime is 65601601679. The reversal of 65601601656 is 65610610656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5665171 + ... + 5676738.

Almost surely, 2^65601601656 is an apocalyptic number.

It is an amenable number.

65601601656 is an abundant number, since it is smaller than the sum of its proper divisors (99082931544).

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

65601601656 is a wasteful number, since it uses less digits than its factorization.

65601601656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11342159 (or 11342155 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 65601601656 in words is "sixty-five billion, six hundred one million, six hundred one thousand, six hundred fifty-six".