163487745 has 24 divisors (see below), whose sum is σ = 283733736. Its totient is φ = 87084288.

The previous prime is 163487743. The next prime is 163487771. The reversal of 163487745 is 547784361.

163487745 is a `hidden beast` number, since 1 + 634 + 8 + 7 + 7 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 102272769 + 61214976 = 10113^2 + 7824^2 .

It is not a de Polignac number, because 163487745 - 2¹ = 163487743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 163487745.

It is not an unprimeable number, because it can be changed into a prime (163487743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44727 + ... + 48243.

It is an arithmetic number, because the mean of its divisors is an integer number (11822239).

Almost surely, 2^163487745 is an apocalyptic number.

163487745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163487745 is a deficient number, since it is larger than the sum of its proper divisors (120245991).

163487745 is a wasteful number, since it uses less digits than its factorization.

163487745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561 (or 4558 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 163487745 is about 12786.2326351432. The cubic root of 163487745 is about 546.7998681874.

The spelling of 163487745 in words is "one hundred sixty-three million, four hundred eighty-seven thousand, seven hundred forty-five".