163156645 has 4 divisors (see below), whose sum is σ = 195787980. Its totient is φ = 130525312.

The previous prime is 163156597. The next prime is 163156657. The reversal of 163156645 is 546651361.

163156645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84621601 + 78535044 = 9199^2 + 8862^2 .

It is a cyclic number.

It is not a de Polignac number, because 163156645 - 2¹⁷ = 163025573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16315660 + ... + 16315669.

It is an arithmetic number, because the mean of its divisors is an integer number (48946995).

Almost surely, 2^163156645 is an apocalyptic number.

It is an amenable number.

163156645 is a deficient number, since it is larger than the sum of its proper divisors (32631335).

163156645 is an equidigital number, since it uses as much as digits as its factorization.

163156645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32631334.

The product of its digits is 64800, while the sum is 37.

The square root of 163156645 is about 12773.2785532924. The cubic root of 163156645 is about 546.4304872011.

The spelling of 163156645 in words is "one hundred sixty-three million, one hundred fifty-six thousand, six hundred forty-five".