163613745 has 12 divisors (see below), whose sum is σ = 283597236. Its totient is φ = 87260640.

The previous prime is 163613713. The next prime is 163613759. The reversal of 163613745 is 547316361.

163613745 is a `hidden beast` number, since 1 + 636 + 13 + 7 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127035441 + 36578304 = 11271^2 + 6048^2 .

It is not a de Polignac number, because 163613745 - 2⁵ = 163613713 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1817886 + ... + 1817975.

It is an arithmetic number, because the mean of its divisors is an integer number (23633103).

Almost surely, 2^163613745 is an apocalyptic number.

163613745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163613745 is a deficient number, since it is larger than the sum of its proper divisors (119983491).

163613745 is a wasteful number, since it uses less digits than its factorization.

163613745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635872 (or 3635869 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 163613745 is about 12791.1588607131. The cubic root of 163613745 is about 546.9403049959.

The spelling of 163613745 in words is "one hundred sixty-three million, six hundred thirteen thousand, seven hundred forty-five".