163858992025 has 27 divisors (see below), whose sum is σ = 214492283613. Its totient is φ = 124158722400.

The previous prime is 163858991971. The next prime is 163858992049. The reversal of 163858992025 is 520299858361.

The square root of 163858992025 is 404795.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 32217737049 + 131641254976 = 179493^2 + 362824^2 .

It is not a de Polignac number, because 163858992025 - 2¹¹ = 163858989977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38453395 + ... + 38457655.

Almost surely, 2^163858992025 is an apocalyptic number.

163858992025 is the 404795-th square number.

163858992025 is the 202398-th centered octagonal number.

It is an amenable number.

163858992025 is a deficient number, since it is larger than the sum of its proper divisors (50633291588).

163858992025 is an frugal number, since it uses more digits than its factorization.

163858992025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8570 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 163858992025 in words is "one hundred sixty-three billion, eight hundred fifty-eight million, nine hundred ninety-two thousand, twenty-five".