163040645 has 4 divisors (see below), whose sum is σ = 195648780. Its totient is φ = 130432512.

The previous prime is 163040623. The next prime is 163040663. The reversal of 163040645 is 546040361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546040361 = 479 ⋅1139959.

It can be written as a sum of positive squares in 2 ways, for example, as 74943649 + 88096996 = 8657^2 + 9386^2 .

It is a cyclic number.

It is not a de Polignac number, because 163040645 - 2¹⁴ = 163024261 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, 16304060 + ... + 16304069.

It is an arithmetic number, because the mean of its divisors is an integer number (48912195).

Almost surely, 2^163040645 is an apocalyptic number.

It is an amenable number.

163040645 is a deficient number, since it is larger than the sum of its proper divisors (32608135).

163040645 is an equidigital number, since it uses as much as digits as its factorization.

163040645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32608134.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 163040645 is about 12768.7370166356. The cubic root of 163040645 is about 546.3009573570.

The spelling of 163040645 in words is "one hundred sixty-three million, forty thousand, six hundred forty-five".