163505457 has 6 divisors (see below), whose sum is σ = 236174562. Its totient is φ = 109003632.

The previous prime is 163505449. The next prime is 163505471. The reversal of 163505457 is 754505361.

163505457 is a `hidden beast` number, since 1 + 63 + 50 + 545 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 105760656 + 57744801 = 10284^2 + 7599^2 .

It is not a de Polignac number, because 163505457 - 2³ = 163505449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163505497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9083628 + ... + 9083645.

It is an arithmetic number, because the mean of its divisors is an integer number (39362427).

Almost surely, 2^163505457 is an apocalyptic number.

It is an amenable number.

163505457 is a deficient number, since it is larger than the sum of its proper divisors (72669105).

163505457 is a wasteful number, since it uses less digits than its factorization.

163505457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18167279 (or 18167276 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 163505457 is about 12786.9252363498. The cubic root of 163505457 is about 546.8196139478.

The spelling of 163505457 in words is "one hundred sixty-three million, five hundred five thousand, four hundred fifty-seven".