65449270161 has 80 divisors (see below), whose sum is σ = 109113827328. Its totient is φ = 38755864800.

The previous prime is 65449270157. The next prime is 65449270171. The reversal of 65449270161 is 16107294456.

65449270161 is a `hidden beast` number, since 6 + 544 + 92 + 7 + 0 + 16 + 1 = 666.

It is not a de Polignac number, because 65449270161 - 2² = 65449270157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65449270171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36138946 + ... + 36140756.

Almost surely, 2^65449270161 is an apocalyptic number.

It is an amenable number.

65449270161 is a deficient number, since it is larger than the sum of its proper divisors (43664557167).

65449270161 is a wasteful number, since it uses less digits than its factorization.

65449270161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 65449270161 in words is "sixty-five billion, four hundred forty-nine million, two hundred seventy thousand, one hundred sixty-one".