155328605 has 4 divisors (see below), whose sum is σ = 186394332. Its totient is φ = 124262880.

The previous prime is 155328571. The next prime is 155328653. The reversal of 155328605 is 506823551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65723449 + 89605156 = 8107^2 + 9466^2 .

It is a de Polignac number, because none of the positive numbers 2^k-155328605 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 15532856 + ... + 15532865.

It is an arithmetic number, because the mean of its divisors is an integer number (46598583).

Almost surely, 2^155328605 is an apocalyptic number.

It is an amenable number.

155328605 is a deficient number, since it is larger than the sum of its proper divisors (31065727).

155328605 is an equidigital number, since it uses as much as digits as its factorization.

155328605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31065726.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 155328605 is about 12463.0897052055. The cubic root of 155328605 is about 537.5478724262.

The spelling of 155328605 in words is "one hundred fifty-five million, three hundred twenty-eight thousand, six hundred five".