2118165617511 has 6 divisors (see below), whose sum is σ = 3059572558640. Its totient is φ = 1412110411668.

The previous prime is 2118165617413. The next prime is 2118165617531. The reversal of 2118165617511 is 1157165618112.

2118165617511 is a `hidden beast` number, since 2 + 1 + 1 + 8 + 1 + 6 + 561 + 75 + 11 = 666.

It is not a de Polignac number, because 2118165617511 - 2¹⁸ = 2118165355367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118165617531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117675867631 + ... + 117675867648.

Almost surely, 2^{2118165617511} is an apocalyptic number.

2118165617511 is a deficient number, since it is larger than the sum of its proper divisors (941406941129).

2118165617511 is a wasteful number, since it uses less digits than its factorization.

2118165617511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235351735285 (or 235351735282 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The spelling of 2118165617511 in words is "two trillion, one hundred eighteen billion, one hundred sixty-five million, six hundred seventeen thousand, five hundred eleven".