65621612656 has 10 divisors (see below), whose sum is σ = 127141874552. Its totient is φ = 32810806320.

The previous prime is 65621612629. The next prime is 65621612669.

65621612656 is nontrivially palindromic in base 10.

65621612656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2050675380 + ... + 2050675411.

Almost surely, 2^65621612656 is an apocalyptic number.

It is an amenable number.

65621612656 is a deficient number, since it is larger than the sum of its proper divisors (61520261896).

65621612656 is a wasteful number, since it uses less digits than its factorization.

65621612656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101350799 (or 4101350793 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The spelling of 65621612656 in words is "sixty-five billion, six hundred twenty-one million, six hundred twelve thousand, six hundred fifty-six".