161166655160511 has 48 divisors (see below), whose sum is σ = 293674304746368. Its totient is φ = 77282711755200.

The previous prime is 161166655160471. The next prime is 161166655160657. The reversal of 161166655160511 is 115061556661161.

It is not a de Polignac number, because 161166655160511 - 2¹⁹ = 161166654636223 is a prime.

It is a super-2 number, since 2×161166655160511² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161166655160011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3833446825 + ... + 3833488866.

It is an arithmetic number, because the mean of its divisors is an integer number (6118214682216).

Almost surely, 2^{161166655160511} is an apocalyptic number.

161166655160511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161166655160511 is a deficient number, since it is larger than the sum of its proper divisors (132507649585857).

161166655160511 is a wasteful number, since it uses less digits than its factorization.

161166655160511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7666935732 (or 7666935725 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 51.

The spelling of 161166655160511 in words is "one hundred sixty-one trillion, one hundred sixty-six billion, six hundred fifty-five million, one hundred sixty thousand, five hundred eleven".