258161418 has 20 divisors (see below), whose sum is σ = 578473170. Its totient is φ = 86053752.

The previous prime is 258161401. The next prime is 258161443. The reversal of 258161418 is 814161852.

258161418 is a `hidden beast` number, since 2 + 581 + 61 + 4 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 150479289 + 107682129 = 12267^2 + 10377^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 796633 + ... + 796956.

Almost surely, 2^258161418 is an apocalyptic number.

258161418 is an abundant number, since it is smaller than the sum of its proper divisors (320311752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258161418 is a wasteful number, since it uses less digits than its factorization.

258161418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593603 (or 1593594 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 258161418 is about 16067.4023413867. The cubic root of 258161418 is about 636.7424135578.

The spelling of 258161418 in words is "two hundred fifty-eight million, one hundred sixty-one thousand, four hundred eighteen".