155591169 has 8 divisors (see below), whose sum is σ = 209291232. Its totient is φ = 102809280.

The previous prime is 155591167. The next prime is 155591173. The reversal of 155591169 is 961195551.

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

It is not a de Polignac number, because 155591169 - 2¹ = 155591167 is a prime.

It is a super-2 number, since 2×155591169² = 48417223741573122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 155591169.

It is not an unprimeable number, because it can be changed into a prime (155591167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229147 + ... + 229824.

It is an arithmetic number, because the mean of its divisors is an integer number (26161404).

Almost surely, 2^155591169 is an apocalyptic number.

It is an amenable number.

155591169 is a deficient number, since it is larger than the sum of its proper divisors (53700063).

155591169 is a wasteful number, since it uses less digits than its factorization.

155591169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459087.

The product of its digits is 60750, while the sum is 42.

The square root of 155591169 is about 12473.6189215480. The cubic root of 155591169 is about 537.8505882227.

The spelling of 155591169 in words is "one hundred fifty-five million, five hundred ninety-one thousand, one hundred sixty-nine".