169481155 has 4 divisors (see below), whose sum is σ = 203377392. Its totient is φ = 135584920.

The previous prime is 169481101. The next prime is 169481161. The reversal of 169481155 is 551184961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551184961 = 211 ⋅2612251.

It is not a de Polignac number, because 169481155 - 2²⁷ = 35263427 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16948111 + ... + 16948120.

It is an arithmetic number, because the mean of its divisors is an integer number (50844348).

Almost surely, 2^169481155 is an apocalyptic number.

169481155 is a deficient number, since it is larger than the sum of its proper divisors (33896237).

169481155 is an equidigital number, since it uses as much as digits as its factorization.

169481155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33896236.

The product of its digits is 43200, while the sum is 40.

The square root of 169481155 is about 13018.4928083093. The cubic root of 169481155 is about 553.4016780228.

The spelling of 169481155 in words is "one hundred sixty-nine million, four hundred eighty-one thousand, one hundred fifty-five".