65121121164 has 36 divisors (see below), whose sum is σ = 167018636792. Its totient is φ = 19733672640.

The previous prime is 65121121123. The next prime is 65121121193. The reversal of 65121121164 is 46112112156.

65121121164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22423177 + ... + 22426080.

Almost surely, 2^65121121164 is an apocalyptic number.

It is an amenable number.

65121121164 is an abundant number, since it is smaller than the sum of its proper divisors (101897515628).

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

65121121164 is a wasteful number, since it uses less digits than its factorization.

65121121164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44849286 (or 44849273 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The spelling of 65121121164 in words is "sixty-five billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred sixty-four".