161755470511 has 8 divisors (see below), whose sum is σ = 161846955680. Its totient is φ = 161664018912.

The previous prime is 161755470467. The next prime is 161755470521. The reversal of 161755470511 is 115074557161.

161755470511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161755470511 - 2²¹ = 161753373359 is a prime.

It is a super-2 number, since 2×161755470511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161755470521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22421941 + ... + 22429153.

It is an arithmetic number, because the mean of its divisors is an integer number (20230869460).

Almost surely, 2^161755470511 is an apocalyptic number.

161755470511 is a deficient number, since it is larger than the sum of its proper divisors (91485169).

161755470511 is an equidigital number, since it uses as much as digits as its factorization.

161755470511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785.

The product of its (nonzero) digits is 147000, while the sum is 43.

The spelling of 161755470511 in words is "one hundred sixty-one billion, seven hundred fifty-five million, four hundred seventy thousand, five hundred eleven".