163265785 has 4 divisors (see below), whose sum is σ = 195918948. Its totient is φ = 130612624.

The previous prime is 163265771. The next prime is 163265789. The reversal of 163265785 is 587562361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587562361 = 683 ⋅860267.

It can be written as a sum of positive squares in 2 ways, for example, as 126067984 + 37197801 = 11228^2 + 6099^2 .

It is a cyclic number.

It is not a de Polignac number, because 163265785 - 2⁷ = 163265657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163265789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16326574 + ... + 16326583.

It is an arithmetic number, because the mean of its divisors is an integer number (48979737).

Almost surely, 2^163265785 is an apocalyptic number.

It is an amenable number.

163265785 is a deficient number, since it is larger than the sum of its proper divisors (32653163).

163265785 is an equidigital number, since it uses as much as digits as its factorization.

163265785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32653162.

The product of its digits is 302400, while the sum is 43.

The square root of 163265785 is about 12777.5500390333. The cubic root of 163265785 is about 546.5523008741.

The spelling of 163265785 in words is "one hundred sixty-three million, two hundred sixty-five thousand, seven hundred eighty-five".