155360449 has 4 divisors (see below), whose sum is σ = 156350164. Its totient is φ = 154370736.

The previous prime is 155360441. The next prime is 155360459. The reversal of 155360449 is 944063551.

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 114490000 + 40870449 = 10700^2 + 6393^2 .

It is a cyclic number.

It is not a de Polignac number, because 155360449 - 2³ = 155360441 is a prime.

It is a super-2 number, since 2×155360449² = 48273738226963202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155360441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494622 + ... + 494935.

It is an arithmetic number, because the mean of its divisors is an integer number (39087541).

Almost surely, 2^155360449 is an apocalyptic number.

It is an amenable number.

155360449 is a deficient number, since it is larger than the sum of its proper divisors (989715).

155360449 is an equidigital number, since it uses as much as digits as its factorization.

155360449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989714.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 155360449 is about 12464.3671720629. The cubic root of 155360449 is about 537.5846042414.

The spelling of 155360449 in words is "one hundred fifty-five million, three hundred sixty thousand, four hundred forty-nine".