169555356441 has 27 divisors (see below), whose sum is σ = 253703398429. Its totient is φ = 109116020832.

The previous prime is 169555356409. The next prime is 169555356559. The reversal of 169555356441 is 144653555961.

The square root of 169555356441 is 411771.

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

169555356441 is a `hidden beast` number, since 1 + 6 + 9 + 5 + 5 + 535 + 64 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17380467225 + 152174889216 = 131835^2 + 390096^2 .

It is not a de Polignac number, because 169555356441 - 2⁵ = 169555356409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169555356401) 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, 35821711 + ... + 35826443.

Almost surely, 2^169555356441 is an apocalyptic number.

169555356441 is the 411771-st square number.

169555356441 is the 205886-th centered octagonal number.

It is an amenable number.

169555356441 is a deficient number, since it is larger than the sum of its proper divisors (84148041988).

169555356441 is an frugal number, since it uses more digits than its factorization.

169555356441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9530 (or 4765 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 54.

The spelling of 169555356441 in words is "one hundred sixty-nine billion, five hundred fifty-five million, three hundred fifty-six thousand, four hundred forty-one".