165016061156511 has 12 divisors (see below), whose sum is σ = 240176048300760. Its totient is φ = 109170931044240.

The previous prime is 165016061156509. The next prime is 165016061156579. The reversal of 165016061156511 is 115651160610561.

165016061156511 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 1 + 60 + 6 + 11 + 565 + 11 = 666.

It is not a de Polignac number, because 165016061156511 - 2¹ = 165016061156509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165016061146511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69981364876 + ... + 69981367233.

It is an arithmetic number, because the mean of its divisors is an integer number (20014670691730).

Almost surely, 2^{165016061156511} is an apocalyptic number.

165016061156511 is a deficient number, since it is larger than the sum of its proper divisors (75159987144249).

165016061156511 is a wasteful number, since it uses less digits than its factorization.

165016061156511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139962732246 (or 139962732243 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The spelling of 165016061156511 in words is "one hundred sixty-five trillion, sixteen billion, sixty-one million, one hundred fifty-six thousand, five hundred eleven".