65613973161 has 24 divisors (see below), whose sum is σ = 97152933472. Its totient is φ = 39356064000.

The previous prime is 65613973147. The next prime is 65613973163. The reversal of 65613973161 is 16137931656.

It is not a de Polignac number, because 65613973161 - 2¹¹ = 65613971113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65613973161.

It is not an unprimeable number, because it can be changed into a prime (65613973163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 896515 + ... + 966936.

Almost surely, 2^65613973161 is an apocalyptic number.

It is an amenable number.

65613973161 is a deficient number, since it is larger than the sum of its proper divisors (31538960311).

65613973161 is a wasteful number, since it uses less digits than its factorization.

65613973161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863573 (or 1863562 counting only the distinct ones).

The product of its digits is 612360, while the sum is 48.

The spelling of 65613973161 in words is "sixty-five billion, six hundred thirteen million, nine hundred seventy-three thousand, one hundred sixty-one".