65156222216205 has 64 divisors (see below), whose sum is σ = 116035110846720. Its totient is φ = 34689473019648.

The previous prime is 65156222216201. The next prime is 65156222216207. The reversal of 65156222216205 is 50261222265156.

65156222216205 is a `hidden beast` number, since 6 + 5 + 1 + 5 + 6 + 222 + 216 + 205 = 666.

It is not a de Polignac number, because 65156222216205 - 2² = 65156222216201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65156222216201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 264779554 + ... + 265025516.

It is an arithmetic number, because the mean of its divisors is an integer number (1813048606980).

Almost surely, 2^{65156222216205} is an apocalyptic number.

It is an amenable number.

65156222216205 is a deficient number, since it is larger than the sum of its proper divisors (50878888630515).

65156222216205 is a wasteful number, since it uses less digits than its factorization.

65156222216205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249387 (or 249381 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 65156222216205 in words is "sixty-five trillion, one hundred fifty-six billion, two hundred twenty-two million, two hundred sixteen thousand, two hundred five".