258165494 has 8 divisors (see below), whose sum is σ = 391082688. Its totient is φ = 127804600.

The previous prime is 258165469. The next prime is 258165497. The reversal of 258165494 is 494561852.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258165497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638822 + ... + 639225.

It is an arithmetic number, because the mean of its divisors is an integer number (48885336).

Almost surely, 2^258165494 is an apocalyptic number.

258165494 is a deficient number, since it is larger than the sum of its proper divisors (132917194).

258165494 is a wasteful number, since it uses less digits than its factorization.

258165494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278150.

The product of its digits is 345600, while the sum is 44.

The square root of 258165494 is about 16067.5291815512. The cubic root of 258165494 is about 636.7457646245.

The spelling of 258165494 in words is "two hundred fifty-eight million, one hundred sixty-five thousand, four hundred ninety-four".