154159102161 has 27 divisors (see below), whose sum is σ = 230668566609. Its totient is φ = 99206860032.

The previous prime is 154159102147. The next prime is 154159102189. The reversal of 154159102161 is 161201951451.

It is a happy number.

The square root of 154159102161 is 392631.

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

154159102161 is a `hidden beast` number, since 1 + 5 + 4 + 1 + 591 + 0 + 2 + 1 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 70084620225 + 84074481936 = 264735^2 + 289956^2 .

It is not a de Polignac number, because 154159102161 - 2⁵ = 154159102129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154159102121) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34156641 + ... + 34161153.

Almost surely, 2^154159102161 is an apocalyptic number.

154159102161 is the 392631-st square number.

154159102161 is the 196316-th centered octagonal number.

It is an amenable number.

154159102161 is a deficient number, since it is larger than the sum of its proper divisors (76509464448).

154159102161 is an frugal number, since it uses more digits than its factorization.

154159102161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090 (or 4545 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

Multiplying 154159102161 by its sum of digits (36), we get a square (5549727677796 = 2355786²).

The spelling of 154159102161 in words is "one hundred fifty-four billion, one hundred fifty-nine million, one hundred two thousand, one hundred sixty-one".